If you go to the store at this time of year, you will find overpriced makeup and costumes. Why does it have to be so expensive to celebrate Halloween?! It doesn't! If your little boy is anything like most little boys, he likes Thomas the Train. I have found a tutorial that will probably cost you a couple bucks and you will get an awesome looking Thomas the Train costume!
To learn how to make this costume, read the tutorial at Little Red Window.