My kids 6 & 9 went to a toy demonstration thing and were really taken with Gravitrax (fancy marble run with all sorts of cool stuff). It's expensive though.
They both have birthdays coming up and Christmas so half thinking about buying a kit but not sure if they'll get into it for a couple of days then just leave it in the cupboard if it gets fiddly to set up from scratch!
Anyone have any and does it get played with?