I made this bag for my son who LOVES his cars. He is always trying to carry 5 or 6 of his most favorite cars around, and I spend a lot of time waiting for him to pick up all the cars he's dropped before we can go anywhere. I finally decided he needed a purse- so this was my solution. There are a bunch of tutorials online for bags like this. I used this one, but I wouldn't recommend it... it was a little confusing, I ended up modifying it in the end (to add the strap), and I didn't realize that there would be exposed seams inside. I didn't read very well before I started cutting up fabric. I like the way it turned out anyway- and it is just the right size for Lightning McQueen and his friends.