Door -to-door Salesman

Today my doorbell rang. When I answered, it was Wally. He had been playing in the backyard, but I guess he went around the house. He had a plastic toy tool case that looks like a suitcase, with rocks in it. He said that he needed to come in and talk to me while I sat on the couch, and he sat on the other couch. And then, he would leave again. So I invited him in and we both took a seat. He held up the case and showed me the rocks, and told me about where he got them outside.Then he told me he was going to fill up the plastic pool when he left. Considering the temperature, I told him he wasn't. It felt just like I was haggling with a mini rock salesman. Kind of scary that he may have found his calling at age four.