Pick a cute monster, color it, then press "Set free in the moonlight" — it starts roaming instantly and stays as long as you keep the page open. Friendly monsters only!
Our moonlit hill ·
🎨 Color a monster and press "Set free in the moonlight"!
Pick & color
Brush size
How it works
Choose one of six friendly monsters, then paint inside the outline with the brush — colors never spill outside the lines, so it is great for young kids. "Base color" fills the whole body underneath what you already painted, and the eraser turns areas back to white. When you press "Set free in the moonlight", your monster appears on a hill beneath the full moon and each one moves its own way: the ghost floats and sways through the air, the slime boings along squishing as it lands, the cyclops stomps around happily, the bat flutters and swoops across the sky, the baby dragon trots and bursts into little sprints, and the mummy shuffles along at its own sleepy pace. Monsters roam the whole moonlit hill among glowing fireflies and drifting fog. Your own monsters never disappear while the page is open; the background is filled with recent drawings from other visitors around the world, which rotate over time. When you leave the page, your latest drawings are sent to the hill so other visitors can meet them too.
Six friendly monsters and where they come from
The cyclops is one of the oldest monsters on record, appearing in Greek epic nearly three thousand years ago. One suggestion for how the idea arose is that ancient people found fossil elephant skulls, whose large central nasal opening looks convincingly like a single eye socket. The mummy comes from Egyptian burial practice, though the shambling bandaged figure is an invention of nineteenth-century fiction rather than anything Egyptian.
Dragons appear independently in cultures across the world, but they are not the same creature: European dragons are winged, hoard treasure and breathe fire, while East Asian dragons are long, wingless, associated with water and rain, and generally benevolent. Bats are the only mammals capable of true flight, and most species eat insects rather than anything more dramatic. Ghosts and slimes are pure imagination, which makes them the easiest two to colour however you like.
Making a monster friendly rather than frightening
Bright, saturated colours read as friendly. Dark reds and blacks are what make a shape look threatening.
Pastels work especially well on the dragon and the slime, and turn both into something closer to a pet.
Give the cyclops a large, light-coloured eye. A small dark eye is the single thing that makes it look sinister.
The ghost suits pale blues and greens. A white ghost vanishes against the moon in the background.
Two colours per monster is plenty. Mixing six makes any creature look muddled rather than fun.
Night on the moonlit hill
Set free, your monster appears on a hill beneath a full moon and moves in its own way. Ghosts drift and fade rather than walking. Bats fly in the erratic, jinking path real bats take while chasing insects. The baby dragon flaps unevenly, the mummy shuffles slowly, the cyclops strides, and the slime bounces and squashes as it goes.
Everything you release stays on the hill while the page is open, so it fills up as you colour more. None of it leaves your browser, so use save picture on anything worth keeping.
Yes. While you are on the page, your monsters roam only on your own hill. When you leave the page, your latest drawings are uploaded and appear as background monsters on other visitors' hills. No name or personal information is attached — only the picture itself.
Is it scary for young children?
No — every monster is drawn in a cute, friendly cartoon style with big round eyes and smiles, and the night hill glows with a warm full moon and fireflies. It is designed to feel cozy, not spooky.
Is this safe for kids?
Yes — there is no free drawing, no text, no chat and no user names. Children can only color inside fixed monster outlines, so nothing inappropriate can be created or shared.
Can I save my monster as an image?
Yes — press "Save picture" to download your colored monster as a PNG image, ready for printing or sharing.
How does each monster move in the moonlight?
Each one has its own personality: the ghost drifts and sways through the air, the slime squishes flat and boings back up, the cyclops stomps around cheerfully, the bat swoops across the sky, the baby dragon trots and breaks into little sprints, and the sleepy mummy shuffles along among the fireflies and drifting fog.
Are bats really blind?
No — that old saying is a myth. All bats can see, and many rely on echolocation as well: they send out high-pitched calls and read the returning echoes to fly precisely in the dark and catch insects mid-air. That skill is why a bat feels right at home on this moonlit hill.