Heat&Bond. Comes in a roll. If your Walmart has a sewing department they sell it.
Pellon 808 Craft Fuse backing
Scisors, Thread (white,black, and your 3 colors. I'd recommend a basic little sewing kit. No need for 5 full spools.)
Iron, pencil, and paper.
The felt, heat&bond,a onesie or shirt, and pellon can all be purchased for under $10 making this another super thrifty way to spice up your child's wardrobe without ever paying overpriced boutique prices.
So I had already cut the wing off of my design before the photo. I'll take this time to remind you not to freak out if things don't go exactly like you wanted when making things. Just push through. You might like the end product better than what you had imagined.
With this type of design you'll need to cut out each piece so you can iron them all onto their respective colors. Next peal off the paper back and place it on the item you are appliqueing on.
Thread your needle. I use a strand of thread in half so I have 2 lines going through the needle because I want my stitching to really show up.