Me and a friend bought these fanny backs for our 6 year old boys to take to Disney. The theory was that they could hold their own water, snacks, sunglasses, etc. These even came with their own water bottles and two separate pouches to carry things in. They looked very durable and were bright colors that the kids liked. Sounds good right?
So the first day we get up and put them on, and they're too big. Way too big! We had to tighten them as far as they would go, then put two big knots in them to make them fit. ONce they were on, we realized that they were huge! Even with nothing in them they looked like they were full of stuff. With that done we were on our way.
They worked great for the first half of the day but then they got heavy and they were bulky, and they were just getting in the way. Needless to say, they were left at the hotel after that. I think they might work well for an older child maybe 10 or 11, but they are just too big and bulky for a 6 year old.