Whacky Wheels Kit: Parts List and Build Ideas
By Circuit Cubes | Tenka Inc. | Published: 2026-10-17
Category: Product Reviews
Explore the Whacky Wheels Kit contents, see what you can build, and get practical advice on whether this set fits your young inventor.
Quick Answer
The Whacky Wheels Kit is a self-contained set that snaps together Circuit Cubes, building bricks, wheels, and gears to make more than 10 different self-powered vehicles. It's a great entry point if you want a guided build experience without buying parts separately. If you already own Circuit Cubes and just need more wheels or gears, buying parts individually is cheaper.
What's in the Box
The Whacky Wheels Kit includes Circuit Cubes (a battery and motor), building bricks, wheels, and gears. The exact cube count isn't listed in the catalog, but the set is designed so you can build over 10 different vehicles by following the included instructions. After those, you can pull out your own bricks and experiment with pool noodles and other household items.
Build Ideas Beyond the Instructions
Once you've built the guided vehicles, try swapping the wheels for larger gears to change speed, or add a pool noodle as a bumper to test collisions. Because the motor cube rotates at over 1,000 RPM, you can also create a simple fan by attaching a brick-built blade. The key is to keep the battery cube connected and experiment with different gear ratios.
Decision Rules for Choosing the Whacky Wheels Kit
- Rule 1: Count your existing cubes: If you already have a Battery Cube and a Geared Motor Cube, buying the kit may duplicate what you own. Check your stash before purchasing. If you already have cubes, consider buying parts like wheels and gears separately.
- Rule 2: Consider the build variety: With over 10 guided builds, the kit offers substantial variety for the price. If you prefer open-ended tinkering, you might outgrow the instructions quickly. Great for guided learning; less ideal for pure free-builders.
- Rule 3: Budget for replacement parts: Small parts like bushings can get lost. A single Bushing #3713 costs only $0.07, so it's smart to have spares on hand. Keep a few bushings in your parts drawer to avoid downtime.
Product Facts
- Whacky Wheels Kit: The Whacky Wheels Kit lets you snap together Circuit Cubes, building bricks, wheels, and gears to make more than 10 different self-powered vehicles. You get a ready-to-build project that teaches basic circuits and motion without needing extra parts.
- Cube Combo: The Cube Combo includes a Battery Cube that delivers approximately 3.7-4.2 volts DC and a Geared Motor Cube that rotates at more than 1,000 RPM. This is the power and motion core of many builds; knowing the voltage and RPM helps you predict performance and choose compatible parts.
Who Should Buy the Whacky Wheels Kit?
Best for
- Young inventors who want a guided, structured introduction to building motorized vehicles
- Families looking for a complete set that works out of the box without extra purchases
Not for
- Builders who already own multiple Circuit Cubes and just need extra wheels or gears
- Those who prefer open-ended, parts-only creativity without following instructions
