Promptkoi

Cardboard Rocket Space Adventure

Stable Diffusion
By Varun Sharma Tested with Stable Diffusion SDXL 1.0

Cardboard Rocket Space Adventure is a tested Stable Diffusion SDXL 1.0 prompt for childrens book work. It runs at Stable Diffusion SDXL 1.0 · Aspect ratio 3:2 · Steps 30 · CFG scale 6 · Sampler DPM++ 2M Karras, and ships below with the exact prompt text, usage notes, and 2 pasteable variations.

Last tested: July 2026 with Stable Diffusion SDXL 1.0

Part of the Stable Diffusion prompt library.

Remix in builder
Two kids flying a hand-drawn cardboard rocket past smiling planets and a crescent moon in a whimsical sketch
Cardboard Rocket Space Adventure — Stable Diffusion SDXL 1.0, Aspect ratio 3:2

Prompt 

Two small children piloting a homemade cardboard rocket ship through outer space, drifting past friendly smiling planets, ringed worlds and a crescent moon, a wobbly rocket flame and looping crayon stars trailing behind, whimsical hand-drawn children's-book illustration, loose ink linework with soft coloured-pencil shading, warm cream paper texture, playful and cheerful

Negative prompt 

text, watermark, realistic, photograph, 3d render, sleek metal rocket, scary, dark, harsh outlines, extra fingers, deformed faces

Settings

Model
Stable Diffusion SDXL 1.0
Aspect ratio
3:2
Steps
30
CFG scale
6
Sampler
DPM++ 2M Karras

How to use this prompt

'Homemade cardboard' is the heart of the charm, and SDXL will quietly upgrade it to a sleek chrome spaceship unless you keep repeating it's cardboard — brown flaps, tape and drawn-on windows. Anchor the medium words too ('loose ink linework, coloured-pencil shading, cream paper texture'), or the model drifts to a flat digital vector look that loses the storybook warmth. Giving the planets simple smiling faces sets the friendly register in one stroke. Keep the two kids small and stylised rather than detailed — tiny simplified figures both read as children more reliably and dodge the uncanny faces SDXL gives small background people.

Variations to try

  • Underwater swap — turn the rocket into a cardboard submarine drifting past friendly fish and a smiling octopus
  • Bedtime palette — deep indigo night tones with a glowing moon nightlight for a calming lights-out page
hand drawn whimsical childrens book illustration

Explore collections

Whimsical Illustration Prompts Whimsical Children's Book Prompts

What to do next

Adapt it →

Open this prompt in the Stable Diffusion builder, pre-filled, and change one layer at a time.

Explore more →

Browse the full Stable Diffusion prompt library — every entry tested with its settings.
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For developers — copy this prompt as JSON 
{
  "title": "Cardboard Rocket Space Adventure",
  "prompt": "Two small children piloting a homemade cardboard rocket ship through outer space, drifting past friendly smiling planets, ringed worlds and a crescent moon, a wobbly rocket flame and looping crayon stars trailing behind, whimsical hand-drawn children's-book illustration, loose ink linework with soft coloured-pencil shading, warm cream paper texture, playful and cheerful",
  "negative_prompt": "text, watermark, realistic, photograph, 3d render, sleek metal rocket, scary, dark, harsh outlines, extra fingers, deformed faces",
  "model": "Stable Diffusion",
  "model_version": "SDXL 1.0",
  "settings": {
    "aspect_ratio": "3:2",
    "steps": 30,
    "cfg": 6,
    "sampler": "DPM++ 2M Karras"
  },
  "style_tags": [
    "hand-drawn",
    "whimsical"
  ],
  "use_case_tags": [
    "childrens-book",
    "illustration"
  ],
  "source_url": "https://promptkoi.com/prompts/stable-diffusion/hand-drawn-space-adventure/"
}

The whole library is available as an open JSON dataset · developer docs.