Kids Closet...Good Idea?

I make the kids a closet with activities. These are learning activities that I have to help with. Here are a few of them... play dough painting cutting and coloring coloring and preschool books activity books flash cards learning games alphabet blocks Sounds great, right? I am not so sure... For the last week I have been sitting with the kids doing these activities NON STOP!! I am tired and I wish they would play with their toys. Ugh. It would be nice to do one or two activities a day but one every half hour!!?? They seem to cry over these activities more then they did before them. Oh well...