Rocket Balloons

Today, we did a fun science experiment showing force.  We blew up balloons and taped a straw to the side.  Then, we threaded the straw to a string going across the room.  We made hypotheses about the best method to help the balloon travel the farthest, then tested our ideas!

Afterwards, we took the balloons, cut off the tops, and stretched them around tubes or cups with the bottoms cut out.  Presto, a penny launcher!