Any idea if the marbles are 16mm (0.63 in) in diameter? Thanks!

Yes. These marbles are standard toy size marbles (5/8 inch or 16 mm). Thanks for the question!

Do these fit in the marble shoot game?

These marbles are standard toy-size marbles (5/8 inch or 16 mm), feel free to compare the dimensions to confirm compatibility. Thanks for the question!

Is this compatible with National Geographic brand marble run?

Yes. All of our marbles are standard size marbles. National Geographic made their marble runs to be compatible with our marble run toys so they interconnect. Thanks for the question!

Is marble genius compatible with magicfly marble run?

The tubes from our sets have an outside diameter of 27mm (1.06'') and an inside diameter of 24mm (0.95''). You can compare the dimensions of our sets with your existing set to confirm if they're compatible. Thanks for the question!

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Description

🌟 Build. Glow. Dominate the marble race after dark!

GLOW GO AFTER DARK - 30 glow marbles—including motion-activated ones—light up your track for thrilling nighttime races.
EXPANDABLE COMPATIBLE - Seamlessly integrates with all Marble Genius accessories for ever-growing, epic marble run adventures.
LIMITLESS CREATIVITY UNLEASHED - 300 transparent, interlocking pieces let you build endless marble run designs that mesmerize and challenge.
STEM FUN MEETS FUTURISTIC PLAY - Encourages critical thinking, motor skills, and problem-solving with space-themed elements and an elevator feature.
GUIDED MASTERY AT YOUR FINGERTIPS - Free app access with step-by-step instructions and fresh challenges keeps builders engaged and inspired.

The Marble Genius 300 pcs Glow Marble Run Set combines 181 transparent track pieces with 30 glow-in-the-dark marbles—including motion-activated ones—and space-themed elements to create an immersive STEM building experience. Designed for kids 4+, it features easy assembly, a glow tower, and a free app with interactive guides, making it perfect for developing creativity, problem-solving, and motor skills. Fully compatible with other Marble Genius sets, it offers endless expansion possibilities.