How Much Interaction Is Too Much?

Jenn Said,

I do know the importance of parent and child interaction. Sometimes I feel as if I am going overboard and not allowing more freedom without my interaction.

I have a 3 and a 5 year old and when my they are working on a project I tend to hop in with the intention to help them out even if they don't request the help. It does not sound that bad but I have noticed that when my kids do other things I tend to the same thing. In other words I consistantly hop into whatever they are doing. Most of the time they don't seem to mind but I just feel as if I just hop in out of habit and should let them be.

So how do I know how much is too much? If anyone has any input it would be appreciated.