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cars party race
Great Summer Science Experiment... Alka-Seltzer Rockets!
balloon powered car
Lego car with balloon power
Car Party activity
balloon powered lego car...that looks really cool!...have a contest...see whose car goes the farthest!
got to try this!!! Balloon powered cars!
Balloon Powered Car | Experiments | Steve Spangler Science. Great activity for summer/spring break/race car birthday parties/rainy day
Balloon propelled Lego car