While every child develops differently typically by the age of six and seven, your child socially and emotionally will be very into what their friends think of them.
They'll be hurt by criticism, they'll have moments of low self-esteem, and low self-confidence and they'll really want to be liked by all, and they're eager to please.
This is really a very important time for parents to really help build up their self-esteem. So, encourage positive feedback, positive reinforcement, and this is why sports is a really great thing to incorporate into a child's routine because any organized team sport provides that opportunity for the child to feel successful, to feel belonged, to feel like they are a part of something, and will really help with their self-confidence.
Aside from that, at this point in time also your child maybe into complaining. They have very strong emotional feelings, and they may tend to complain.
While it can be annoying, it is important to support them and be patient with this because it is typical. It's just part of that natural development.
So, again you want to be patient with their volatile emotions, and you also want to be supportive through providing them positive feedback, and encouragement. It's really important at this age.