I used Reggio's idea yesterday and got a big bucket of soapy water and some cloths and the kids washed the ride on cars and the play structure...that kept them busy for an hour...although the little ones did eat some soap! Today we'll do non-soapy water in buckets and I'll put them in their swim suits and let them get wet with the sprinkler as well...it will be the afternoon, so I'll keep their clothes outside and the parents can dress them before going home if they wish.