Why is it important that help and an appropriate amount of time are available to children during play?

Children learn through repeated practice, so they need enough time to practice at their own pace without feeling rushed.
Children do not practice new skills naturally, so it is important someone is available to help them repeat the skill until it is perfected.
Children need approximately three hours to learn a new skill if it is repeated, so it is important they have this block of time to learn.
Children are incapable of learning new things without assistance, so they must have someone available to walk them through each step of a new skill.

All are true, but children should not repeat the skill constantly.

Explanation:

Psychology. If a person keeps doing something over and over again, the brain stores the information to be able to do that in the short term memory. But if someone does it a few times, take a break, and does it again, then does not do until maybe the next day, the brain stores it in long term memory, because you don´t do it for a long time. Like walking. You do it constantly. But what if you have not walk in a week ( Maybe you broke your leg and have used a wheel chair.) You have most likely forgotten how to walk correctly and need to practice until you can walk normally again.

I am sorry for writing a long explanation.