[prawn]

Wasn't aware of the game. I'll investigate - thanks!

We've had months where Gravitrax has dominated the house and been very popular. Dedicated table for it in the living room. At one point, my 10yo son and I would make a very elaborate set of tracks every night. We'd start with a three way splitter at the high point and take one run each, and leave the third for one of his sisters. But after a while, unless I have time to play it with him, his interest fades and he does crosswords or reads instead.

Many years ago, I set up something like the tumble game for them. Not computing anything, but more like a maze. Tilted the coffee table slightly and let them stick Lego pieces to the surface and attach rubber bands, then roll marbles down. That was popular for a bit.