I'm not sure if you're interested in this 'connector' type stuff called mobilo, it's got these rectangle links and wheels that you can make cars, trains, trucks, buildings even a robot if you have the right pieces, etc, similar to leggo I guess. But if you have trouble with the kids cleaning up the mess it might be an issue as there are lots and lots of little pieces. We also have a little pram with baby and DS loves using it. We've recently got a little keyboard with drums and a mike and again it's a big hit as DS loves his own voice so we get lots of singing every day. Blocks and puzzles are good too. Kitchen tea parties? Cooking pots or like a little kitchen set up?