Editor’s pick
CrunchLabs by Mark Rober The Crunchinator
A hand-cranked crusher that shows how gears multiply force
About $35brand list price View on Amazon
Ravensburger GraviTrax Starter Set
Design marble runs powered by gravity, magnets and momentum.
Best for kids who like building marble runs and fixing what stalls.
· $50 – $100 Typical price range
Paid link: Electroys may earn a commission at no extra cost to you. Listing verified October 28, 2026.
At a glance
- Age guidance
- Ages 8+
- Price
- $50 – $100
- Screen needed
- No, fully screen-free
- Batteries
- Not needed
- Adult help
- Some, for setup
- Play style
- Solo or together
- What it is
- 122 pieces: tiles, tracks, marbles, magnetic cannon, vortex
- Great for
- Holiday, Birthday, Rainy Day
Kids arrange hexagonal tiles on base plates, stack height tiles and connect tracks to build marble runs, using parts like a magnetic cannon, vortex and switches to change the marble's path. They learn by testing: if the marble stalls, they adjust heights and angles until it reaches the finish.
Why we picked it
- 01122 pieces support many different track designs
- 02Includes action pieces like a magnetic cannon and vortex
- 03Expandable with a wide range of add-on sets
What they’ll learn
Always follow the manufacturer’s age and safety guidance. Small parts may be a choking hazard for children under 3.
You might also like
More for ages 9–12 More picks like this.
Editor’s pick
Thames & Kosmos Mega Cyborg Hand
Build a giant wearable robot hand powered by water pressure
About $45brand list price View on Amazon
SmartMax Start Magnetic Discovery Set
Chunky magnetic bars and balls that show attract and repel
Typical price $25 – $50 View on Amazon
Thames & Kosmos V8 Race Car Engineering Set
Build a motorized race car with a V8, gearbox and suspension
About $40brand list price View on Amazon