Trains are in my mind

My son loves Chuggington right now. He still loves Thomas but he chooses to watch chuggington over Thomas.Then I thought why not design his Bday invitation...even though it is still in MAy. It takes me forever to do one design anyway. I made this when I was designing Toms Shoe student project. I might use this for his thank You card...but my mind always changes...constantly :(