Yes, that's a great idea. My parents were very good at this and sent me off on all sorts of activities, and independent adventures as I got older. It didn't cure me of my perfectionist traits, but it definitely helped. I have actually just recently signed my son up to ballet as well. It's not an activity that plays to his strengths, so I think it'll be good to help him learn to work at and enjoy something he's not naturally good at.