U-Turn and Uterus

We were out to dinner in November at an Asian restaurant and I was sitting next to Dahrius. He had his usual train in his hand and was driving it up and down the table in front of him. I was teaching him "left turn" and "right turn" and "u-turn" as he drove. Satisfied that he was occupied, I turned my attention back to the dinner conversation. To our surprise, we heard Dahrius driving his train and saying "now my train is making a uterus" as he made a u-turn! Guess he took Mom's reading the pregnancy books to heart! Nana