In middle school I imagined a toy that would be a top with a similar mechanism as this cube. It could spin it's outer shell and then tilt and engage a "wheel" h

In middle school I imagined a toy that would be a top with a similar mechanism as this cube. It could spin it's outer shell and then tilt and engage a "wheel" hoop, just a bit above the the tops tip, exchange some of of it's angular momentum for linear, right itself and build up angular momentum again. This would enable a fully enclosed, no external moving parts RC vehicle. It seems such a thing is possible now.