Tomorrow is a big day at our house. My "little" one turns 4!! He is excited. His birthday party will be on Sunday but we will have playgroup tomorrow and do lots of fun things then. The theme this year is space. We tested the rocket activity today and it works great. You make them out of film canisters, toilet paper tubes and an alka seltzer tablet. It really flies the right amount for a little one to do. We also are making can coolers (for water bottle, no soda at this age) and playing pin the comet to the solar system! For food we're having "moon" pizzas (make your own) and rocket pops with cake. I bought "rockets" at the dollar store that you squeeze in water and then throw so we are going to play "splashdown" They were two for a buck so the kids can take one home as favors. I splurged on the treat boxes although I probably could have figured out how to make them myself. They look like the space shuttle. We filled them cheap though so it wasn't too bad.