Structures & Contraptions by  "8 years old" and "4 years old"

KEVA Brain Builders Deluxe

KEVA Contraptions Reactions

KEVA Contraptions 50 Plank Set

LEGO Chain Reactions

STEM Machines Engineering Kit

Q-BA-MAZE 2.0 Grand Prix Racing Set

Q-BA-MAZE 2.0: Super Race Set

Spin-Gineer

Engino Deluxe Architecture Set

Spin-Gineer Construction Kit & Refill Rods: Set of 2

KEVA Design Woods

E-Blox® Circuit Blox 395, Circuit Board Building Blocks Classroom Set, 264 Pieces

Snap Circuits^®: My Home

Geomag™ Mechanics Gravity Loops & Turns: 130 Pieces

Design Your Own Gumball Machine Kit

KEVA Contraptions 200 and 400 Plank Sets with FREE Bonus Planks

STEM Newton's Laws Engineering Kit