Coloring Book Maker

What you're buying: a download package (skill instructions + a Python script) that runs on your own computer inside your own AI agent — it is not a cloud service.
You need: an AI agent that supports skills (e.g. Claude Code or Codex) — its subscription or API costs are yours; Python 3.9+ with pillow and numpy; internet connection.
Third-party services: Pollinations.ai line-art images (free tier: about 1 image per 45 s; optional paid key for speed and quality). Only the English page descriptions are sent — no personal data.

Name a theme, get a print-ready coloring book. For Amazon KDP low-content books, Etsy printables, or printing at home for your kids.

What you get

• 📕 Interior PDF: 300 DPI pure black-and-white — title page → (blank back) → "This book belongs to" page → each coloring page followed by a blank back → closing page; total pages padded to an even number
• 📐 Sizes: US Letter 8.5×11 in (most common on KDP) or A4; optional KDP bleed (8.625×11.25 in); changing size needs no new images
• 🖼️ Preview sheet to check every page at a glance
• 🧾 KDP and printable-shop notes: page count, bleed, separate cover, AI-content disclosure

Example

Dino Friends, a 4-page kids' book (ages 3–6), US Letter, single-sided: a 14-page PDF with title page, "belongs to" page, 4 coloring pages each with a caption ("Lunch time!") and page number, and a "Great job, little artist!" ending. Line coverage per page was measured at 15.9% / 4.8% / 9.0% / 16.4% (kids' target 3–22%). One draft page came out too busy, was flagged "too dark" automatically, and only that page was regenerated. A4 and bleed versions were rebuilt in seconds without new images.

The 4 coloring pages:

The whole interior PDF — title, "belongs to" page, coloring pages with captions, ending page:

Try it — copy a prompt

• "Make a 20-page ocean-animals coloring book for ages 4–6, US Letter, with KDP bleed."
• "Create a 12-page adult mandala coloring book in A4 for an Etsy printable."

Why buy it

One payment, as many books as you like — no monthly subscription for a coloring-page generator.

Who it's for

Amazon KDP low-content publishers, Etsy printable sellers, parents, teachers and activity-book makers.

Features

• Line-art clean-up: AI images often contain grey shading that prints as solid black. Adaptive thresholding turns shading into colourable outlines, removes specks and hollows out solid black blobs
• Automatic quality check per page: measures line coverage; pages that are too dark, too empty or touch the edge are regenerated (up to 3 tries, best one kept)
• Two modes: kids (thick lines, big shapes, age-tuned) and adult relaxation (mandalas, zentangle patterns)
• Caching: change the title, captions or size and the PDF rebuilds in seconds; only edited pages are regenerated

How it works

1. Tell your agent the theme, age group and page count.
2. The agent plans each page for that age (varied compositions, no repeats) for you to approve.
3. The script generates, cleans, checks and lays out the PDF.
4. The agent reviews every page and redoes any bad ones before delivery.

Requirements

• Python 3.9+
• pip install -U pillow numpy
• Internet connection

Speed

• Free image tier: about 1 image per 45 s, so a 20-page book takes 15–25 minutes (resumable)
• Faster: get a key at enter.pollinations.ai and set it as the POLLINATIONS_KEY environment variable

Limitations (please read)

• AI-generated content: line art is generated by AI and cleaned by the script. Most pages are usable as-is; some need one regeneration, and odd details (an extra toe, merged lines) can appear.
• On the free tier the image model doesn't always follow "line art" instructions; the clean-up helps, but detail is below hand-drawn quality. A key gives better results.
• Interior pages only — no KDP cover (cover width depends on final page count; use KDP's cover calculator).
• No copyrighted characters (Disney, Pokémon, etc.) and no imitation of their styles.
• KDP requires you to disclose AI-generated content; platform rules change, so check them yourself.
• No guarantee of sales or approval.

Files

• SKILL.md — agent workflow
• scripts/make_coloring_book.py — generation, clean-up, checks, PDF layout
• references/page-design.md — complexity by age and how to write page descriptions
• references/kdp-notes.md — KDP and printable-shop notes
• references/themes.md — theme ideas
• references/example_kids_dino.json / example_adult_mandala.json — kids and adult examples