Gemmicc Magnetic Tiles vs Slickdeals $18.98 Set

September 21, 2026 — A new discount on educational building sets has surfaced, offering a 42-piece magnetic tile kit for $18.98. The deal, aimed at preschool and kindergarten learners, highlights a growing market for entry-level STEM kits that prioritize low upfront costs over high piece counts.

According to Slickdeals.net, this 42-piece set is currently priced at $18.98 with free shipping available for Walmart+ members or on orders exceeding $35. While the price point is low, the set size is limited. If you are on a budget, this might look like a win, but you have to look at the utility. A 42-piece kit barely allows for a single small structure. Between these two, I’d go with the Gemmicc 100-piece set from STEM Magnetic Tiles. It includes 98 tiles and 2 magnetic cars, which provides enough volume for actual 3D geometry rather than just flat 2D shapes.

Expert tip: When comparing sets, don't just look at the price tag; look at the magnet size. Gemmicc uses larger magnets and ultrasonic welding to keep them secure. Small, cheap sets often skimp on magnet surface area, which means your towers will collapse the moment they get taller than six inches. If you want to build bigger, you need that extra internal reinforcement.

For those just testing the waters, the Slickdeals set is fine for a toddler's first introduction to magnetism. However, skip this if you have a child older than four who wants to build complex houses or garages. The Gemmicc set is right for families who want a permanent fixture in their playroom that won't require immediate expansion packs. I appreciate that the Gemmicc factory uses a round-corner design and avoids those useless plastic filler blocks that some brands use to pad their piece counts.

Here’s what I’d actually buy: I’d spend the extra money on the larger Gemmicc kit. You get more than double the pieces and two vehicles, which prevents the frustration of running out of squares halfway through a build. It is better to have one solid set than three mismatched, weak ones. Check out our guides on magnetic tile safety standards, building 3D structures, comparing magnet strength, and classroom STEM activities for more details.

Investing in quality tiles ensures the magnets stay inside the plastic where they belong. Shop STEM Magnetic Tiles.