I used these star stickers, but any small star stickers will work. I put them on the shirt first before doing my toddler’s hand print over them. I then carefully peeled them off with a tweezer to get the flag look.
Foil Star Stickers, 1/2", 440 Total 6007
This is the paint I used on the shirts. I have washed the shirts a couple times now and the color has held up. They do recommend to wash them inside out.