We're having a party for my son's 2nd birthday on Sunday and are holding it in a local garden sqaure. Fortunately the weather is supposed to be good, but I need some ideas for games that we can play outdoors. Ages of guests will range from 18 months to 6. We won't have access to any music so my usual stock of musical bumps/statues and pass the parcel are out of the window. Any suggestions greatly appreciated!!