The four-year-old daughter loves dance, so much, that for the past couple of years we have had her in several dance classes. Her appetite for dance is insatiable. Her little brother has tagged along to all of her classes and, also wants to dance .
He is not nearly as coordinated or graceful as the the three and four year olds in his sisters class, but has at least as much passion. His dancing consists of running around in a circle and occasionally a simulated leap. (As much of a leap as a toddler can manage) He ends up on the floor a lot, being almost two falling down is de rigueur, it does not phase him in the least.
The few times which he has successfully invaded his sisters class, and the dance teacher allows him to stay, the girls generally don't mind him but they often just think he is so cute, they end up too distracted to keep dancing.
Maybe he can take this lesson into his teenage years; girls love a guy who really wants to know ballet.