Reinforced toe so that when your child uses his shoes to stop his ride on toy/bicycle/tricycle he won't come home with a hole on the top of his shoe. (Remind me to tell you the story where I was going to accuse my son's preschool of misconduct until I figured out what was going on.)
Removable Insole so that you can figure out if the shoe fits without your kids having to tell you. Because honestly a lot of times they really don't know.
Hook and loop closure - Because not every kid can tie laces.
Lightweight which is not always a benefit since they can run away from you faster. ;)
Flexible because shoes should be comfortable and not interfere with developing feet.
Vegan because it is good for the cows and it is less expensive.