the chains were extremely thin and hard to put over exsisting swing link. I bought for two families and one we managed to force over , the other we had to buy other links at hardware store to fit. My grandchildren range from 3-5 years and they don't quite grasp how to get it moving by themselves but they seem to enjoy it when pushed like a swing. I hope they learn to manuver it by themselves as they grow because that was the idea in getting these for them. Some children have better motor skills than others and more height which would help.