Velcro fastenings are useful for children who cannot fasten laces.
Some people find Velcro fastenings or elastic laces helpful.
The diaper can be made with no fastenings or hook & loop fastening.
Young junior girls may still find complicated clasps and fastenings tricky, therefore a swimsuit that is easy to get on and quick to take off can help when getting changed on their own.
The chairs on the British system weigh about 45 or 50 lb each on important lines, though they may be less where the traffic is light, and are fixed to the sleepers each by two, three or four fastenings, either screw spikes, or round drift bolts entered in holes previously bored, or fang bolts or wooden trenails.