Then I packed each back with a small activity book (8 for $1, Walmart), a toy car (3 for $1, Dollar Tree), a small pack of crayons (8 for $1, Dollar Tree), Mario Kart Wii tattoos I ordered online (8 for $4, BirthdayExpress.com) and a Mario Bros fruit snack (10 for $3, Walmart). You could also print out coloring sheets from my Mario Kart Wii Coloring Pages post, roll them up and put them in the gift bags.
I folded over the top of each bag, lined them up and put my Homemade Mario Kart Wii Standups next to them. I used them as part of the birthday party decorations. They were a big hit! Here is the end result:
You can use this idea with any theme really. Get creative and have fun!