The list includes allowing children to climb trees, have water fights, build go-karts and swim in local ponds or streams. A survey commissioned for Playday found half of children aged between seven and 12 were not even allowed to climb trees without adult supervision, and half have been stopped from climbing trees because it was thought to be dangerous. The theme of this year's Playday is "Give us a go", which calls for a reverse in the decline of children's adventurous play opportunities. "The...