"I bought these for my daughter's b-day party & thought easy assembly meant you have to attach the chin straps but it's NOT this easy. The hats come flat & you have to try to get them in the correct shape (which is difficult to do without denting the hats). And the flap of cardboard that's supposed to hold the hat together is pretty flimsy. Don't buy these...you're better off buying hats that are already put together!!"