Maths · with Jelby

Jelby counts the reef

Jelby's adventures stay close to home in the coral reef right outside Coralis. The whole maths year lives here, with a free game to dive into now.

▶ Play the free game
Jelby's Bubblecraft

Jelby's kit

Every sidekick has the same two pieces of Coralis engineering, tuned to them and built in the Lab by Albert, Debuggy and Nala.

Bubblecraft

The Bubblecraft

A sea, land, flight and space craft in Jelby's colours, call sign JELBY. Jelby floats in the water-filled cockpit; a hull camera on a gimbal feeds the Viewport.

Viewport

The Viewport

The round tablet in the cockpit, tuned to numbers: counting, bonds, adding and more, right there on Jelby's dashboard.

Jelby's reef

Maths is a homebody. The whole Reception year plays out at the reef, with a free game now.

🐠real photo
public-domain archive
Ages 4-5 · Live

Reception Maths Splash

Counting, bonds, comparing, adding, taking away and patterns, free.

Coming soon
🪸real photo
public-domain archive
R to Y6

The growing reef

More opens as the books and games grow.

Coming soon
About the Viewport images: each destination shows a real, licensed photograph (public-domain museum and archive collections). The coloured discs are placeholders until the images are added.

Home is Coralis

Between adventures Jelby is home in Coralis, the advanced city on the seabed where the whole Pod lives. Each sidekick has their own base there, and they share the Lab where the Bubblecraft and Viewports are built. Home never changes; the destinations always do.