I know you have to or at least should wait till your child is old enough to dress them in suspenders for safety purposes. So when is a child old enough to wear them? My daughter has long legs but has a tiny waist so it's hard finding pants or shorts that fit well. She's 18 months and I can't find belts her size so I thought of suspenders but both my husband and I are worried she may too young and/or small for them. Ideas?