01
Start with two frogs
An Azureus and a Green & Black arrive as adults, so you can breed on the first day. The tank holds ten residents to begin with.
A pocket rainforest that keeps running
Collect a rainforest, one morph at a time.
A tiny pixel vivarium for the corner of your screen. Dart frogs, isopods, day geckos and mantises grow while you are away. Breed two adults, merge the duplicates, and fill a field guide of 94 real morphs.
Runs in your browser. Saved on this device. No account.
A small loop that keeps moving:collect, grow, breed, merge.
Every resident is a real species or morph — Azureus, Blue Jeans, Rubber Ducky, Ghost, Orchid. They grow in real time, not on clicks. Adults produce dew while the tab is closed, and eggs hatch whether or not you are watching.
Breeding is a roll. Two adults cost one heart, and the offspring can be anything from the same rarity up to a mythic outlier. When the tank fills with duplicates, merge ten into one of the next rarity. Nothing is lost except the ten you chose.
01Two adults make one egg. The morph is a roll, not a guarantee.
02Ten duplicates become one of the next rarity.
03Adults produce dew while the tab is closed.
04Every new morph fills a page in the field guide.
Ninety-four small lives.
Five families, each drawn as a pixel sprite with its own palette, pattern, and way of moving through the tank. Some are common; a few are genuinely hard to breed.
Three things to do, then leave it alone.
Pondlet is an idle toy. The interesting part happens between sessions, not during them.
02
Let the tank run
Residents grow in real time. Close the tab; up to eight hours are simulated when you come back. Eggs need about three minutes.
03
Breed, merge, decorate
One heart per breeding. Ten duplicates per merge. Ornaments change the scene, never the odds. Keep the ones you like marked with a star.
Field notes for a real rainforest.
The game is a toy; the guides are the care sheet. Start with a bioactive vivarium, a humidity range, and a cleanup crew.
Oct 21, 2026
Cleanup Crew: Springtails and Isopods in a Vivarium
Which cleanup crew species to use, how many to add, and how to keep springtails and isopods from crashing in a rainforest vivarium.
Oct 21, 2026Rainforest Vivarium Humidity, Misting, and Ventilation
How to keep a rainforest vivarium at 70–90% humidity without turning it into a mold tank: misting schedules, ventilation, and seasonal adjustments.
Oct 20, 2026What Is a Bioactive Rainforest Vivarium?
A plain-language guide to bioactive rainforest vivariums: the layers, the cleanup crew, the climate, and what actually lives inside.
Oct 20, 2026Bioactive Vivarium Layers: Drainage, Substrate, and Leaf Litter
How to build the false bottom, drainage layer, substrate mix, and leaf litter in a rainforest vivarium without drowning the roots.
Your vivarium is waiting.
Open a tank, breed one egg, and come back tomorrow. It will have changed.