I know what you're going through. I have a three year old and a six year old, and have been in similar situations. What helped with my, now, six year old was Thomas the tank engine. He got so into trains that we'd spend the day building track. With my daughter, she likes arts and crafts. So, we draw and play with play dough. The best thing, though is to get out of the house for a bit. If there's a park you can go to that should work for about an hour. Other than that, if you have to play inside, play puzzles, board games, or build forts out of cushions. Is there any way to connect with other families with small kids and get together. Small kids can wear themselves out when they have other kids to play with.