I tell all my patients this at physical therapy! Homemade Ice packs: 1 part rubbing alcohol to 3 parts water, gets really cold, but never hardens so you can manipulate it. every athlete (or mom) should pin this!
Recycled 2-liter mosquito trap! cut of the top and glue or tape the pieces together, then fill with 1 cup water mixed w/ half packet of yeast and 1/2 cup sugar. Mosquitos are drawn to the CO2 we exhale, and since yeast produces CO2 they will go right for it and not be able to escape. GENIUS!! Plus, you could decorate or theme these to match your next outdoor party... :-)