Arranging an early birthday party and leaving party for dd on Saturday. She wants to invite around 10 friends. So I'm having them from 11am - 2pm for a birthday lunch. So I reckon that eating will only take around half an hour, what do I do with them for the other 2 and a half hours? We have a small house, no garden but a cobbled place outside our front door they can play on. Any ideas?