What did you have and what do your kids have?
We always had one leg of a pair of tights which stretched into these 8' long heavy things that we lugged about the landing. Great for us but I'm far too lazy to replicate it for my kids. My mum always said that pillowcases and big sacks were greedy but I swear she get more into each tight leg!
Mine are having these little felt sacks (about 14" x 10") we got from a Santa Steam ride last year. Being a)miserly b)lazy and c)anti waste and excess plastic Far East tat, I'm going to see how long I can fob them off on the kids