About NestTots

Engine-building — you build up a little machine so it produces more and more each turn — is one of the great modern board-game mechanisms. But it usually starts at age 10 or older (Wingspan, Dominion) and hides the maths behind cards and coins. NestTots brings it to ages 3–5 with one concrete picture a three-year-old can hold: the more twigs in the nest, the more berries Wrenly carries home each trip.

Watch the number climb

The nest is always on screen, and beside it Wrenly’s “carries N berries each trip” grows every time you weave in a twig. The child counts the twigs to guess the carry (predict-before-reveal), then flies home and sees they were right. That’s engine-building and compounding — felt, not lectured.

No losing (and no reward economy)

NestTots has no timer, no streak, no score to chase, and nothing to buy. You can’t lose — the nest only ever grows, and the basket always fills in the end. The berries are the engine’s output, a picture of the maths, never a currency. That’s a rule we hold across the whole library: calm by design.

Game weight (measured, not asserted)

We follow one rule across the library: a game’s weight is measured, never guessed. The pips below come from letting the computer play NestTots hundreds of times and counting how many choices a turn it holds and how long a round runs — so a grown-up can pick by how much the child has to keep in their head.

What it’s good for (and what we don’t claim)

NestTots is gentle practice for the intuition that the more you build, the more you get each time — the seed of multiplication and compounding. It is not a maths program or a brain-training app, and we make no claim it raises IQ or test scores.

Safe by design

• On your device. Progress stays in your browser — no account, no sign-in, nothing sent anywhere.
• No dark patterns. No timer, no streak, no score to chase, and nothing to buy.
• Audio-first, big buttons. Made for a pre-reader to play — hear what happens, tap big targets.

← Start building the nest · For grown-ups