We've had Lego and Duplo around the house for about eight years now. It was only today, as I sat down to play with Jono, that I discovered the smaller Lego bricks could be used together with the Duplo. Amazing! For Jono, who's just entering the world of Lego and has only the crumbs his sister's given him, it means he now has an extended play set. I wonder if other - far smarter - people have realised this before... who would have thunk it?!