Turn a child's name into a 37-page preschool math workbook
Choose the age and the characters, type a name. Numbermill makes the printable workbook and a full Amazon KDP cover in your browser, ready to sell on KDP, Etsy or Teachers Pay Teachers.
- Ages 3–6
- 12 kinds of activity
- Name inside
- KDP cover PDF
- Licence to sell
Flip through a real workbook
This is the book Numbermill made for a 4-year-old called Mia, page by page. Press the arrows, swipe, or click the right-hand page.
Showing 17 of the 37 pages: the start, the first two lands and the ending.
Why preschool workbooks are hard to make, and what Numbermill does about it
Every page is a design job.
Pages are laid out for you: all 37 of them, with the pictures, counts and margins already right.
One wrong count means a one-star review.
Every answer is worked out again from the printed page. A book that fails a check cannot be downloaded.
KDP covers are fiddly.
The full cover is sized to the page count and your KDP paper, with the barcode area left clear.
Personalized orders eat your evenings.
Type a name and the whole book changes: cover, name page, cheers, secret code and certificate.
Generic books get lost in search.
Your series code gives your own covers, titles and puzzles; book 2, 3, 4… build a series.
Try it with a name
Type any first name. The real Numbermill engine makes the whole book in your browser and shows you three of its pages. Nothing is sent anywhere.
The sample is a preview only. Downloading books and KDP covers comes with Numbermill.
One book, two shops
The same Busy Wheels book for ages 4–5 (Level 2, Count to 10), made two ways. Real pages, straight from the files.
Amazon KDP paperback
- 37-page interior, no child's name, black-and-white pages for KDP's black-ink printing
- Full-wrap cover PDF sized to the page count and paper
- The values to type into KDP: trim 8.5 × 11 in, no bleed, ink and paper, AI content: yes
Etsy made-to-order PDF for Mia
- Mia's name on the owner page and the certificate; the secret code spells M-I-A
- File name with the order number:
order-1001-mia-math-workbook-age4-5.pdf - A check before you send it: the app tells you what the code spells
Busy Wheels comes with the Pro upgrade. Numbermill ($7) makes both versions with Forest Friends and Dino Friends.
Free Sample Pack: 10 printable math pages
Real pages from Numbermill workbooks for ages 3–6, an answer key, and a First Workbook Publishing Checklist. Free, by email.
Free gift
10 sample activity pages (PDF) and a basic publishing checklist, for your own family or classroom.
Numbermill, $7
The browser app that makes whole 37-page personalized workbooks, as many as you like, each with a full KDP cover, to sell.
We email you the pack and keep your address as our privacy policy says. Tips and offers only if you tick the box. Unsubscribe any time.
Not just worksheets: a book made for one child
Most preschool workbooks are a stack of worksheets. A Numbermill book is one adventure with the child in it, and every answer is checked by the computer before you can download it.
1234
56- A guide for every land. Ollie the Owl leads Counting Meadow; five characters take the child through five lands.
- The child's name in the book. On the cover, the name page, the cheers on the pages, the secret code and the certificate.
- Answers that are right. Each answer is worked out again from what is printed on the page. A book that fails a check cannot be downloaded.
- Real learning goals. Each page is mapped to a Head Start ELOF or Common Core kindergarten goal, printed small in the footer for parents and teachers.
- A secret code from the name. M, I, A: the child counts dots to find each letter of their own name.
- A reason to finish. The code puts the story's Rainbow Star back together, then comes the certificate.
Everything Numbermill can do
The $7 Numbermill is a complete book maker on its own. The faded cards are optional upgrades offered after checkout, shown here so you know the whole tool before you buy.
Numbermill Included for $7
Pro Optional upgrade
Theme Studio Optional upgrade
Agency Optional upgrade
How it compares with other ways to make a workbook
General comparison of the usual options, not of any one product. Check the details of anything you consider.
| Numbermill | AI prompt packs | PLR / template packs | Canva by hand | |
|---|---|---|---|---|
| Finished, print-ready book PDF | ✓ made for you | ✗ you generate and lay out the pages | ✓ ready-made | ✗ you design every page |
| Full KDP cover sized to the page count | ✓ | ✗ | Sometimes | ✗ you work out the spine |
| Child's name inside the book | ✓ cover, pages, code, certificate | Only if you add it | Rarely | By hand, per child |
| Answers checked | ✓ by the computer, every book | ✗ AI can get counts wrong | You check | You check |
| New book from the same set-up | ✓ book 2, 3, 4… new puzzles | New prompts each time | ✗ fixed pages | Every page again by hand |
| Same pages as other buyers | Shared characters and layouts; your own puzzles, colours and titles | Depends on your prompts | Often the same pages | Your own |
| Ongoing cost | None | Your AI subscription | None | Optional Canva Pro |
People already buy these books
What we found on Amazon.com and Etsy on November 2, 2026. It shows that buyers look for these books, not what you will sell: there is a lot of competition, which is why a name, a theme and a series help.
Screenshots of other publishers' books on Amazon.com, taken on November 2, 2026. They were not made with Numbermill; they show what buyers already rate and buy.
Search counts and ratings change daily. Figures are from public search and listing pages; see the earnings disclaimer.
What you download for every book
The same page grows with the child
Here is the counting page from the same series at the three ages.
12 kinds of activity in every book
5 lands, each with 4 activity pages and a colouring page, plus a name page, a map, a secret code, a certificate and an answer key. Activities are mapped to the Head Start ELOF preschool math goals and Common Core kindergarten math. Click a page to see it full size.
Also inside: numbers before and after, more and fewer, biggest and smallest, matching groups to numbers, shapes, adding and taking away, and tracing numbers. Each book number (book 2, 3, 4…) gives new puzzles in the same look, and the same number always makes the same book again.
One idea, a whole shelf of books
Sellers do better with a series than with one book: buyers who like book 1 look for book 2. Numbermill is built for that.
By level
Three ages, three steps: Count to 5 → Count to 10 → Numbers to 20. Each book says its level on the title page, so parents know what comes next.
By volume
Book 2, 3, 4… gives new puzzles in the same look. The same number always makes the same book again, so a reprint matches.
By character
Forest Friends and Dino Friends in Numbermill; Pro adds Magic, Busy Wheels, Space and Ocean friends.
By season or interest
Theme Studio (upgrade): Christmas, Halloween, horses, pirates and 34 more themes, with a calendar of when to publish each.
Named and no-name
A no-name book for KDP or an Etsy instant download, and the same book with a child's name for Etsy made-to-order.
Colour and black and white
Black-ink interiors print cheaper on KDP; colour suits PDFs. Same puzzles, your choice.
Not only for selling
Parents
Print a book with your own child's name and work through it together, one page a day.
Gifts
A birthday or holiday book with the child's name on the cover, the certificate and the secret code.
Teachers and tutors
A no-name book at the right level for a small group, printed as many times as you need.
Homeschool
Three levels in order, so the next book is ready when the child is.
Who it's for
KDP publishers
Paperback workbooks with the interior and the full cover ready to upload.
Etsy sellers
Instant-download PDFs, or made-to-order books with the child's name.
Teachers Pay Teachers
No-name PDFs in black and white, easy to print for a class.
Parents and grandparents
A one-off book for a child you know, printed at home.
Right for you if…
- you want finished, print-ready books without designing pages
- you sell to parents of children aged 3 to 6
- you are fine telling KDP the pictures are AI-generated
Not for you if…
- you want to draw your own characters or move things around on the page (there is no page editor)
- you need ages over 6 or subjects other than early math
- you need trim sizes other than US Letter or A4
- you expect sales without doing your own listings and marketing
Good to know before you sell
Your licence gives you a series code. It sets the cover colours, the title style, which pictures appear and every puzzle, so books you make look different from books other Numbermill users make with the same settings.
Some things are shared by everyone: the characters, the page layouts and the 37-page structure. That is the Numbermill style, so describe your books by what is inside them, not as one of a kind.
About the pictures
The characters and pictures were made with AI image tools (ChatGPT and Canva), then turned into clean line art and checked one by one. Amazon KDP asks whether a book has AI-generated images: answer Yes. The Help inside Numbermill shows where on the KDP form.
Get Numbermill
- Forest Friends and Dino Friends packs, all three ages, all 12 activity kinds
- 37-page workbooks with or without a child's name, as many as you like
- Files for the shop you sell in: KDP paperback, Etsy instant download or Etsy made-to-order (order number in the file name)
- Each book shows its level: Count to 5, Count to 10 or Numbers to 20
- KDP full-wrap covers for white, cream and premium colour paper
- US Letter and A4, colour or black-and-white inside pages
- Print checks and the KDP earnings panel
- Help inside the app and a Quick Start PDF
- Licence to sell the books you make (see the terms)
30-day refund: if it is not right for you, email hello@printypulse.com or ask WarriorPlus within 30 days of buying. A refund turns off what it paid for.
Questions
Do I need design skills?
No. You pick options and press Make book. The layout, pictures, puzzles and cover are done for you.
What do I need to run it?
A computer with Chrome, Edge, Safari or Firefox. You open Numbermill from the link on your WarriorPlus receipt and paste your licence key. Phones can make books too, but most cannot show the preview, so a computer is easier.
Is anything about the child sent to you?
No. Books are made in your browser. The child's name never leaves your computer.
Will other buyers sell the same book as me?
Not the same book: your series code gives you your own covers, titles and puzzles. The characters and layouts are shared by all users.
Do I have to say the pictures are AI-generated?
On Amazon KDP, yes: KDP asks about AI-generated images and the honest answer is Yes. Etsy and other shops have their own rules; follow them.
Is there a monthly fee?
No. $7 once. If the licence server cannot be reached, the app keeps working for 14 days.
Can I sell the books on Etsy and Teachers Pay Teachers?
Yes, as printed books or PDFs. You may not sell the pictures on their own (for example as clip art). The terms page has the details.
How do I get help?
Email hello@printypulse.com. Send your series code (shown in the app), never your licence key.
Make your first book today
$7 once for Numbermill, with a 30-day refund.
Not ready yet? Get 10 free preschool math printables by email.