I was at Walgreens to buy Father's Day cards and they had a whole bunch of water balloons we couldn't resist. Joshua couldn't wait to try them out. As soon as we got home, we found a pail, filled up some balloons and he got to popping them.
I wasn't sure how well he'd like them since we weren't playing any games or anything, but he loved them. He popped them by stomping them. He popped them by throwing them. He popped them by squeezing them.
Definitely a hit for a warm afternoon.