Yesterday we came across a wooden train that my Nonna passed onto us a while ago. It's the only wooden train we have at our house - the rest are at Ama's. Tonight while lying in bed Taipan told me he wanted to get a wooden train at the toy store and another wooden train at the bookstore so we would have three at our house.
I told him that we have three wooden trains at Ama's house. So then he said, I want the trains from Ama's house, and one from the bookstore, and one from the toy store so we can have six at our house. More math!