Balloon Ping Pong - I do this with foam pool noodles. I fill an extra large balloon at a 1 to 2 ratio of helium to air. It floats in slow-motion - at a perfect speed to allow my residents to see it and to respond. We just LOVE it!
RE-inventing Camp: MOM camp .... what a GREAT idea for summertime. have a group of moms with kids similar ages do a week long mom camp different day different moms/house. one day of kid chaos and fun and 4 days of clean up and relaxing :D I could do this!