HUB STEM Sets: Marble Run vs. Catapult vs. Gauss Cannon
By Toys, Collectibles & More | ToyTopia by Safari Ltd. | Safari Ltd® | Published: 2026-10-25
Category: Comparisons
Compare three HUB STEM marble run sets: the basic marble run, the Catapult Action Set, and the Gauss Cannon Set. Find out which one fits your child's age, skill level, and play style.
Quick answer
For a first STEM marble run, start with the HUB 12 Marble Set and a basic track. The Catapult Action Set adds mechanical action for ages 6+, while the Gauss Cannon Set challenges older kids with physics tricks.
What makes each set different?
All three HUB STEM sets use the same marble size and are compatible with building bricks from other manufacturers. The key difference is the complexity of the action mechanism and the age range they suit best.
The basic marble run (represented by the HUB 12 Marble Set) is a straightforward track-building experience. The Catapult Action Set introduces a button-operated launcher that sends marbles flying, adding cause-and-effect learning. The Gauss Cannon Set uses a magnetic acceleration mechanism for older children interested in physics.
Trade-offs at a glance
- HUB 12 Marble Set (basic track): Best for: Ages 4+ with adult help. Requires you to build your own track from bricks you already own. No moving parts, so it's simple and safe for young children. Trade-off: No built-in action or launcher, so it may feel less exciting after a few builds.
- HUB Catapult Action Set: Best for: Ages 6+ who enjoy mechanical toys. Includes a button-operated catapult and deflector. Works as a standalone set or expansion. Trade-off: The catapult mechanism is less complex than the Gauss Cannon, so it may not challenge older kids who want more physics.
- HUB PI Gauss Cannon Set: Best for: Ages 8+ interested in science and engineering. Uses a magnetic Gauss cannon to accelerate marbles. Fully compatible with other building bricks. Trade-off: More expensive and the magnetic mechanism may be too advanced or frustrating for younger children. If your child is under 8 and new to marble runs, start with the Catapult Action Set instead.
Product facts
- HUB 12 Marble Set: This set of 12 marbles includes marbles in red, yellow, blue, and green. These marbles are the perfect size and weight for maximum track performance. If you already own building bricks, this is the most affordable way to start a marble run; you just need to build your own track.
HUB 12 Marble Set - HUB Catapult Action Set: A button-operated catapult and a deflector to guide your marbles right where you want them. Push the button and watch the ball fly up and defy gravity. The catapult adds a mechanical action that teaches cause and effect, making it more engaging for younger builders who want immediate feedback.
HUB Catapult Action Set - HUB PI Gauss Cannon Set: The exciting Gauss cannon mechanism… Pi combines daring physics tricks with creative construction fun. The Gauss cannon uses magnetic acceleration, which introduces advanced physics concepts like kinetic energy transfer, ideal for older kids who enjoy science experiments.
Which one should you choose?
Best for
- Young children (ages 4-6) who are new to building toys – start with the HUB 12 Marble Set and basic bricks.
- Kids ages 6-8 who enjoy cause-and-effect play – the Catapult Action Set offers immediate mechanical fun.
- Older kids (ages 8+) who love science and engineering challenges – the Gauss Cannon Set teaches physics through play.
Not for
- Children under 3 due to small marble parts.
- Kids who prefer digital or screen-based play – these are hands-on building sets.
- Budget-conscious shoppers looking for a complete track system – the HUB 12 Marble Set requires additional bricks.
