Mason and I went to the grocery store yesterday, and before going in I told him that he WAS NOT going to get a toy this time. Five minutes in and he was asking for a Limbo Dance Set. I sent him to put it back on the shelf, and he returned with Silly String. Again - a reminder of the agreement (though only one of us seemed to be agreeing) and a send off to return the Silly String to the shelf. In the van, on the way home, he was in the backseat saying, "No, No, No, No." I asked him what he was doing, and he said, "Practicing for when I'm an adult."