LEGO Engineering Challenges for Kids (2026)

By Hannah Cole · October 1, 2026

LEGO bricks are engineering tools disguised as toys. These 20 challenges teach structural engineering, mechanical design, and creative problem-solving — the same skills professional engineers use daily, just at a smaller scale.

Engineering Design Process with LEGO

Each challenge follows the 5-step engineering process:

Ask: What's the problem? What are the constraints?
Imagine: Brainstorm possible solutions
Plan: Sketch or describe your design
Create: Build your solution
Improve: Test, identify weaknesses, redesign

20 Challenges by Difficulty

Beginner (Ages 4-7)

1. Tallest Tower: Build the tallest freestanding tower. Measure in LEGO bricks. Constraint: must support a minifigure on top.
2. Bridge the Gap: Span 8 inches between two books. Constraint: must hold 5 LEGO bricks in the center.
3. Animal House: Build a shelter for a toy animal. Must have walls, roof, and a door that opens.

Intermediate (Ages 8-11)

4. Catapult: Launch a LEGO brick at least 2 feet. Use rubber bands for tension. Measure and compete for distance.
5. Gears and Axles: Build a machine that turns a wheel using at least 3 gears. Bonus: make it change direction.
6. Earthquake-Proof Building: Build a 10-brick-tall structure. Shake the table for 10 seconds. If it survives, build higher.

Advanced (Ages 12+)

7. Marble Run: Build a track that guides a marble from top to bottom with at least 3 direction changes.
8. Drawbridge: Build a bridge that opens and closes using a pulley system. Must span 10 inches.

Testing Methods

Challenge Type	Test	Measurement
Structural	Weight test	Coins stacked on center
Height	Stability test	Gentle push from side
Motion	Distance test	Tape measure from launch point
Mechanical	Rotation count	Full turns per input