Think about your attention span when you were 7 or 8 years old. Most kids cannot handle participating in competitive activities on an ongoing basis when they are under 12 years old. Not at all. This means that when kids are exposed to sports we should remember that sport are for fun and they should not be work at this level. We hope the answer is no.
Kids can play sports on even competitive levels at early ages.
Make sure however, the kid never gets lost in the sport. Keeping these questions in mind will not assure that your child will have a stress free experience, but it will help.