Alexander's "project" for the day was to do a good deed, so first I had to explain what a good deed is. I told him that it was something nice that we do for someone else or for the Earth.
A: Oh, I want to do a good deed for the Earth.
Me: Okay, we could take a walk and look for any trash to pick up. Or, we could rake the leaves and put them in the compost bin.
A: Hmmm.... no. I know what we could do nice for the Earth!
A: We could take all the other earths [by which he means planets] and bring them all right next to the Earth so that when the sun goes down and it is nighttime the Earth won't be lonely.
Me: Oh, that would be nice, but the planets are so big I don't think we could move them!
A: We can drive a spaceship that has giant claws that grab the earths to move them.