Zero Gravity have been synonymous with high quality play equipment for over 10 years. Garden swing design hasn’t changed in decades but Zero Gravity are changing that, introducing the new Zero Gravity UFO swing set…. When I was a child Our swing seat was made from wood and the chains to support It were made from steel. Nowadays most seats are made from cheap plastic supported by some blue nylon rope. You could only fit one person on the swing at a time and arguments would normally unfold as to so and so has been on the swing forever – When’s my turn? cheap blue nylon rope has been replaced with steel chains that have been encased in plastic to protect little fingers from getting caught.