Ds has been on a roll lately...here's one, share your own!
Dh and I went out to the movies, when we got home he took the dog out to potty. Ds comes running in the room where I'm sitting with my dad with his socks and shoes in his hands, wearing his cape. I ask where he's going and he replies, "outside, with Superman's dad".
So little Superman goes outside by Superman's dad and says, "hey daddy, I can see through that garbage can." Dh says, "oh really, what's in it?" Superman replies, "garbage".