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Duck Game - Belts

$32.95

Boomerang Car - Worm Gear

$32.95

Mirror Bank - Mirrors

$32.95

Strobe Light Animator - Light Refraction

$32.95

-70%

Drawing Machine - Linkages

$32.95

$9.88

Trip Wire - Momentum Transfer

$32.95

-70%

Build Box

$27.45

$8.23

-70%

Domino Catapult - Projectile Motion

$32.95

$9.88

-70%

Build Box Subscription - Monthly

$32.95

$9.88

-70%

Build Box Subscription - Pay Monthly

$29.95

$8.98

-70%

Build Box Subscription - Pay Annually

$329.40

$98.82

-70%

Coin Spinner - Ratchet

$32.95

$9.88