C.C.
My 3 1/2 year old is exactly the same when it comes to participating in a group event. She just refuses to go. Super excited about it before hand and when we get there and then freezes up/refuses to do anything when it comes time to the event. If you find a method that works, let me know. We've tried everything and now are just going to wait a few months, ignoring the behaviour, and then try again. I hear your frustration, we're at our wits end too sometimes with it.