Any inventors out there?

So we were all at the park the other day. Of course we were pushing the kids on the swings. Becky wondered why in the world don’t we have electric swings. I know they have ones for infants, but why nothing for regular swings at playgrounds? We figured about 90% of a parent’s time at a playground is spent pushing a child on a swing. If we had those electric swings, parents could actually sit down and enjoy the outdoors a little more.