Rex and his friends in Fern Valley

REXtheDinosaur

Stomp, roar, wonder. Big questions, little dinosaur.

For grown-ups

Meet the friends of Fern Valley

Tap a friend to say hello.

Play

Two games from the valley. No sign-up, no downloads — just play.

Count with Dot

How many dinosaur eggs are in the nest? Tap the right number.

Find the Pairs

Turn the stones over and find every friend twice. Skye is watching — she'll cheer.

Learn

Professor Fern's little lessons. One at a time, then a roar.

Roar the letters

Rex's name has three sounds. Tap each one and say it out loud.

Tap a letter.

True things about dinosaurs

    Big, bigger, biggest

    Put the friends in order from smallest to biggest. Tap them one by one.

    Books

    Rex's first stories are being made right now. Here is what's coming to the shelf.

    Picture books and activity books · paperback · ages 3–7

    For grown-ups

    Rex is the little dinosaur who shows children that being small is no reason to think small. Every story starts with something Rex notices and ends with something he understands — and a roar.

    Fern Valley is built for ages three to seven. Nothing in it is scary. Every friend carries one thing worth learning: Dot counts and sorts, Skye looks closely, Bramble keeps trying, Professor Fern names the world, and Rex asks why. The games on this page are free, need no account, and collect nothing.

    Books arrive in paperback first: picture books to read aloud, and activity books for pencils and crayons. Films and songs follow, the way they do in Rex's cousin world, Princess the Unicorn.