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AIR AND WATER CHILLER

4 years ago 19794 0

HOT AIR BALLOON

4 years ago 19219 0

RUBE GOLDBERG CHAIN REACTION

4 years ago 19124 0

Exploding a Watermelon

5 years ago 18757 0

ROPE CLIMBER

4 years ago 18663 0

NEWSPAPER TABLE

4 years ago 17976 0

BUBBLE SOLUTION

4 years ago 17207 0

VINEGAR & BAKING SODA

4 years ago 171912 0

BOTTLE ROCKET

4 years ago 16426 0

CONVECTION CURRENTS

4 years ago 16063 0