3 of 5ism

My boys have been saving their money from allowances and birthdays to buy something big. 2 of 5 asked for a DS and 3 of 5 wants a Leapster dij. I'm not sure if that's what is called, but it's the hand held game system. We told them if they wanted something that expensive, they would have to buy half of it. They are both getting close, more than half way. 3 of 5 comes up to me and says "what if the dog pooped dollars" I didn't think I heard him right, what an odd thing to say. I finally figured out that he did say what I thought he said, and finished with " I would go out and pick them up, and have lots of dollars" I told him, "yes, and I would have 50 dogs.
He really does have odd ideas.