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-70%NEW

Build Box Subscription - Monthly

$32.95

$9.88

-70%NEW

Mirror Bank - Mirrors

$32.95

$9.88

-70%NEW

Boomerang Car - Worm Gear

$32.95

$9.88

-70%NEW

Strobe Light Animator - Light Refraction

$32.95

$9.88

-70%NEW

Domino Catapult - Projectile Motion

$32.95

$9.88

-70%NEW

Drawing Machine - Linkages

$32.95

$9.88

-70%NEW

Trip Wire - Momentum Transfer

$32.95

$9.88

-70%NEW

Duck Game - Belts

$32.95

$9.88

-70%NEW

Build Box

$27.45

$8.23

-70%NEW

Build Box Subscription - Pay Annually

$329.40

$98.82

-70%NEW

Build Box Subscription - Pay Monthly

$29.95

$8.98

-70%NEW

Rocket Revolver - Compressed Air

$32.95

$9.88