In this episode, young Sheldon is seen tap dancing with his drama teacher. In real life, Iain Armitage, who plays young Sheldon, actually is a tap dancer. According to Jim Parsons, who plays adult Sheldon in The Big Bang Theory (2007), Iain wore his tap shoes a lot. In a video Iain and his mother made for Jim Parsons in the airport in NYC, he could hear Iain tapping away.
Sandy Duncan, used as an example of a female playing a boy's role, starred as Peter in "Peter Pan" on Broadway in 1979, and was nominated for a Tony Award.
In both musical and non-musical productions, Peter Pan is usually played by a woman. In the Broadway musical, Peter was played by Mary Martin, Sandy Duncan and Cathy Rigby.