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4Pcs Light Up Marble Balls
Size is 0.63 inch, Compatible with Marbulous marble run toys.
2 AG3 1.5V button cell batteries included with each piece.The battery cannot be replaced.
If it is not used for 2 minutes, the light will go out.
Your kids will enjoy the fun of watching the fluorescent marble balls race through from one track to the other, left to right and top to bottom. It is a delight to see the expanded track after construction, as the marble balls go through the pipelines from one end to the other, in and out of the tubes.
Holiday toy 4Pcs Light Up Marbles Marble Run Supplement Light Beads 4pcs light up marbles B07MTCDXX3