EDIT. I think every kid should be enrolled in sports by the age of 3 and if they aren't then you're a bad parent.
If you haven't enrolled you're kid in at least one activity by the age of 3, then you have failed as a parent.
Activity = anything that is productive with peers, dance, horse back riding, running, football, music or piano, ballerina, tball, basketball, art or anything to that effect.
I only had so much to work with in the title so I went with sports.
Edit. I don't think you fall as a patent. I just added drama to get you in here. Snag line and hook. It worked. Carry on and know you're not a bad parent, everyone tries to do the best they can. As long as you're trying, then you're OK in my book.