TEABAG ROCKET: Amaze your kids! How it works: “Everyone knows that hot air rises and this experiment demonstrates that idea as well as the principles of convection currents. As the tea bag burns, hot air is being created, as well as a thermal, or convection current, under the bag. When the tea bag burns down into a small enough ball of ashes, the convection current causes it shoot up in the air.” [Quoted directly from Steve Spangler Science.]
Toothpick and Gumdrop Construction: Cost: $1 for the box of toothpicks and $1 for each boy a giant box of gumdrops SOO FUN!!! Definitely will do this again. Great for Cub Scouts - could use for constellations or for science molecules. Fun for FHE, too!
Bottle Ecosystem, This is the most awesome class idea to teach ecosystems! Its self contained and you can observe the activity for the rest of the year. No mess no fuss and all of this cost about 17 dollars.