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Showcase · Preschool · produced 2026-09-10

Construction Site Machines — a real preschool coloring book

One preschool theme, three machines at work in bold line: the real topic list, samples and preflight from this run, plus the two pages that went wrong.

Page 1: An excavator scooping a small pile of dirt. Actual 1-bit output, downscaled. Colored view: Example coloring by AI — the product output is 1-bit line art.
Page 2: A tall tower crane standing on its own. Actual 1-bit output, downscaled. Colored view: Example coloring by AI — the product output is 1-bit line art.
Page 6: A cement mixer beside a wheelbarrow of sand. Actual 1-bit output, downscaled. Colored view: Example coloring by AI — the product output is 1-bit line art.

The three choices

Audience
Preschool · Bold lines
Theme
“construction site machines: an excavator, a tall tower crane, a cement mixer, each at work on its own”
Pages
24 art pages, single-sided → 48 interior pages
Generate this book

The 24 topics the planner wrote

  1. an excavator digging beside a small dirt pile
  2. a tall tower crane standing tall
  3. a cement mixer turning beside a stack of bricks
  4. an excavator resting beside a bright orange traffic cone
  5. a butterfly flying near a crane
  6. a cement mixer beside a wheelbarrow full of sand
  7. an excavator scooping gravel under a rainbow
  8. a tower crane standing beside a pile of wooden planks
  9. a cement mixer working beside a stack of pipes
  10. an excavator digging near a small garden fence
  11. a tower crane lifting a bucket high above the ground
  12. a cement mixer beside a puddle reflecting the sun
  13. an excavator beside a row of orange safety cones
  14. a tower crane standing tall beside a fluffy cloud
  15. a cement mixer turning beside a small toolbox
  16. an excavator lifting dirt beside a stack of bricks
  17. a tower crane beside a small parked dump truck
  18. a cement mixer resting beside a bright yellow helmet
  19. an excavator digging beside a tall wooden fence
  20. a tower crane working beside a stack of steel beams
  21. a cement mixer beside a pile of sand and a shovel
  22. an excavator beside a small bird resting on a branch
  23. a tower crane standing beside a pile of bricks and boards
  24. a cement mixer working beside a bright red fire truck

The grid filling up — real timestamps

  1. 0 min0/24 ready
  2. 9 min3/24 ready
  3. 11 min8/24 ready
  4. 12 min11/24 ready
  5. 13 min13/24 ready
  6. 14 min16/24 ready
  7. 16 min21/24 ready
  8. 16 min22/24 ready
  9. 19 min23/24 ready
  10. 105 min24/24 ready
  11. 127 min23/24 ready
  12. 131 min24/24 ready

24 pages, 131 minutes, 24 credits. No page needed frame cropping.

Preflight — the six checks the download waits for

  • All pages ready24 / 24
  • 1-bit — no gray pixelsguaranteed by the cleaning pipeline
  • Page count within the supported range24 art · 48 interior · 24–300
  • Inside margin (gutter)0.375 in · 48 interior pages
  • Outer safe margin0.375 in · 113 px
  • Resolution2550 × 3300 · 300 DPI

The first 8 interior pages

First eight pages of Construction Site Machines as they appear in the PDF

What you are looking at

Everything above comes from one real CrayonMill run: the audience, theme, and page count typed into the wizard; the 24 topics the planner wrote from three machines — an excavator, a tower crane, a cement mixer — each kept on its own page with a small piece of the site beside it; the pages as they left the 1-bit cleaner; and the preflight the download button waits for. Nothing here is retouched. The colored panels are AI examples made from the finished line art so a page can be pictured filled in — the product itself is black-and-white line art.

Two pages we would redraw before publishing

Twenty-two of the 24 pages are the machines you would expect. Two are not, and we leave them in the list so the numbers stay honest. On page 5 the planner shortened "tower crane" to "a crane" and the drawing model painted the bird. On page 24 the topic asked for a "bright red" fire truck, and on a black-and-white page a color word turns into a solid fill instead of a line. Both pages were redrawn twice with the same topic and came back the same way, because the mistake lives in the topic text, not in the drawing. Since this run the planner strips color words from every topic and keeps multi-word machine names intact; if you generate this theme today, those two pages come out as machines. Regenerating a page costs one credit, and a page that fails the reviewer twice is refunded.

Why this book is a good KDP candidate

Work machines are a strong preschool theme because every subject is a big, boxy silhouette with one memorable move: the excavator's arm, the crane's tall lattice tower, the mixer's tilted drum. At bold weight those shapes stay readable even when a child colors straight across the lines. Every topic keeps one machine as the main subject and adds at most one simple site object — a pile of dirt, a stack of bricks, a wheelbarrow — so there is always a second thing to color without a second machine competing for attention.

What the planner learned from this book

This was the first book produced with the category tree that now powers the "Browse ideas" chips in the wizard, and it taught the planner two rules that are now permanent. Compound names such as "tower crane" or "fire truck" are never shortened, because a single word can mean a different thing to the drawing model. And adjectives that describe color or shine never reach a topic, because a 1-bit page cannot draw "red" — it can only draw a line or fill a shape.

Sources

Last verified 2026-09-10. Updated 2026-09-10.

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