Filling up the tank

Last Saturday I went out to the garage to find Luke like this. He smiled up at me and said "Mom, pee, car!" He had dropped his drawers and was filling up the tank of his little car. He was pretty happy about it, I might add. I guess Ryan and I are to blame for creating this little monster. I tried to explain to him that we only pee in the potty but it was pretty hard to stifle my laughter.