Mystery Marbles

Three glass marbles in a liquid filled tube. What's so special about that? Well, no matter which way you turn or tilt the tube, the three marbles will move together but they never touch... This is a great brain teaser, but what's the trick? Is it magnetism? Anti-gravity? There's more than meets the eye! Perfect for a science table or a fabulous discrepant event.
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[@robertfrench5916]

There are actually 5 marbles in there. 2 are clear marbles in between the colored ones. The solution used is veg. oil that has the exact visible light index of the clear marbles, making them seem invisible :)

[@abhaypandey7906]

Maybe they have magnetic properties