Would this be a good way to make money?

I need a lot of money fast. Well, by fast and a lot of money I mean like $150+ a month at a minimum. I am going to make and sell homemade playgyms, playstands, and toys. I will sell them on Ebay, I will make a website, and I'll try to get some pet stores to buy some to sell. So what do you think? Could I make my minimum? If not, I have to get a job. Our financial situation is going down fast, and if I don't earn some money for this, I'll have to get a job myself. I'm only 14 and I don't want to work all summer, and then fall behind with schoolwork when school starts back up.