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BUBBLE SOLUTION

4 years ago 19067 0

SMOKE RING LAUNCHER

4 years ago 213915 3

HOT AIR BALLOON

4 years ago 20369 0

ROPE CLIMBER

4 years ago 20423 0

VINEGAR & BAKING SODA

4 years ago 184712 0

WIND POWER

4 years ago 227816 0

NEWSPAPER TABLE

4 years ago 19366 0

BOTTLE ROCKET

4 years ago 18026 0

DIY SUBMARINE

4 years ago 21607 0

CONVECTION CURRENTS

4 years ago 17324 0

AQUA MAGIC

4 years ago 23485 0

AIR AND WATER CHILLER

4 years ago 21214 0

RUBE GOLDBERG CHAIN REACTION

4 years ago 20574 0

Gyro Car

5 years ago 681540 2

Cage Illusion

5 years ago 23468 2