A local nursery uses a thing that's like a long rubbery belt that all the children are tied to and they also hold onto the handles when they are out walking together. I appreciate the need to keep them safe, no easy task, but they have to walk so closely behind each other that if one trips it looks like they'll all trip.
I've worked in nurseries before and we didn't have them but I'm curious to know if they're common now and also what are they called? A crocodile? No I don't want to buy one. I'm just curious.