Whatever happened to hand-holding is beyond me. Leashing a child is terrorist material! It could hurt or suffocate a child, and it is sure to tear. There is no need to dehumanize children. Only dogs need leashes. Not human beings. If you need to leash your child, you fail in parenthood.
If you need to use a leash to control your child, you have failed as a parent. Children are not dogs that need to be put on a leash. If you are afraid of your child wandering off, you could hold their hand or pick them up, there is no reason to dehumanize a child by putting them on a leash.