Sakkaro

Fifteen translucent pieces that stack, nest and interlock — and wherever two overlap, the colour changes into something neither of them was.

On a light table it's mesmerising. Off it, it's still lovely: pieces that catch whatever light is in the room. There's an ideas booklet with over 100 patterns if your child wants somewhere to start, and no obligation to open it if they don't.

Quiet, absorbing, and endlessly repeatable. Good for a child who settles when there's something to look at and nothing being asked of them. Comes with a storage box, which matters more than it sounds when small pieces are involved.