Firstly I have to give credit to another Instructable which gave me the idea to use a sweatshirt and socks for this costume. It's called No-sew octopus costume and it's awesome, go check it out!
My version involves a few differences so I thought I'd make an Instructable in case anyone wanted to make one like mine.
Step 1: Gather Materials
One hooded sweatshirt
8 matching knee high socks
80 matching buttons (I used two different colors but you'll want them to be the same size)
2 larger buttons for eyes
One foam wreath circle.. mine was 12" which works for a small toddler.
Two half spheres of foam for eyes
Hot glue and glue gun
Stuffing of your preferred type to make the legs
Step 2: Make Legs!
Hot glue 10 buttons in two rows of five on the bottoms of the socks for the octopus suckers.
Step 3: Attach Legs
Fold each sock over the wreath and hot glue the sock to itself (see photo), removing stuffing as needed. I tried to alternate the direction my socks were facing so that the legs looked more dynamic. It might look weird if they are all facing the same way!
Step 4: Make Eyes
Hot glue the foam pieces to either side of the sweatshirt hood.
Step 5: Attach Legs to Body
Done! Go trick or treating!!