"I got these, along with over $150 worth of decorations, for my son's 1st birthday party. I didn't see the review about assembly. I tried to put one together last night and it does not seem right. The strings are easy, but the flap/opening is the issue. And where do the clear seals go? Ugh, my prototype was a disaster and I need to assemble 15 more before Saturday. : ( Not happy!"