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BUBBLE SOLUTION

4 years ago 14837 0

SMOKE RING LAUNCHER

4 years ago 174415 3

HOT AIR BALLOON

4 years ago 16459 0

ROPE CLIMBER

4 years ago 15933 0

VINEGAR & BAKING SODA

4 years ago 149712 0

WIND POWER

4 years ago 188616 0

NEWSPAPER TABLE

4 years ago 15416 0

BOTTLE ROCKET

4 years ago 14106 0

DIY SUBMARINE

4 years ago 17357 0

CONVECTION CURRENTS

4 years ago 13563 0

AQUA MAGIC

4 years ago 18735 0

AIR AND WATER CHILLER

4 years ago 17464 0

RUBE GOLDBERG CHAIN REACTION

4 years ago 16634 0

Gyro Car

4 years ago 499438 2

Cage Illusion

4 years ago 19008 2