Q and U and W and T and ?

His mother was the bride in a Tom Thumb Wedding when she was 8 years old, so I guess it doesn't seem so strange that her youngest son would be a participant in a pretend wedding. But what the heck? The wedding of Q and U? He was happy; he wore the tux from when he was in a real wedding last May, so maybe he thinks he's married to the girl from his preschool. I was afraid to ask if he was Q or U. They brought in wedding gifts and I assume there was a wedding march: "Here comes the Q and here comes the U."