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I think you mean round child.
Assume a spherical child in a frictionless vacuum.
That’s gonna make active shooter drills really annoying, logistically, but maybe that’s the point of the exercise
You just put a jack under one end of the building, lift it up and let them roll out the other side. Easy peasy.
I thought this was taking place in a vacuum
You’ll still roll without air. Air has a negligible, if anything negative, impact on rolling.