The children learned about astronomy and the shape of the universe. Astrophysicist Bradley Johnson learned if children have a universal vice, it’s fidget spinners. Take a trip back to school with another episode of Big Ideas with Little Kids.

In Bradley’s defense, it’s not an easy thing to teach to children. When you really think about it, how many natural occurrences can you definitively explain? Not to take the Insane Clown Posse’s side on something, but could you explain how magnets work to children? If you answered yes, we’ve got an 8-minute show we’ll need you to star in.

This is the second episode of the Inverse Original Series Big Ideas with Little Kids, and features some very interesting musings on both science and time travel.

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