A bunch of Barbie dolls
Glue (plain old superglue worked well for me)
A string of lights (go with LED ones!)
A large piece of cardboard or plastic
A large diameter hoop
You can use action figures, toy cars (Cena
made that one), or just about anything else that you have a bunch of. I suggest sterilizing whatever toy you use. Chances are it is pretty dirty. And if you hang it outside for a few years and live in a damp place it just might start to grow things. Trust me. Sterilize. Let's add something to the list...
Some bleach water and a towel
For the base you can use a ring of plywood, a bicycle rim, a commercially made wreath base, a ring from a stove cooktop, or just about anything else you can find. The size will depend on the toys you're working with.