sure child leashes are weird and raise uncomfortable questions but consider: child magnets
At the zoo we have some preschools that do field trips, and they have these long ropes with plastic handles, and the kids each have a handle, and a buddy (who holds the other side of the handle). If they have empty spots they know there are kids missing.
They look like giant baby centipedes and they are a huge pain in the ass to every other zoo visitor, and employee.
I’ve seen those and they are my favorite thing ever. They’re terrible, but you’re right—they’re centipedes made of children. Still not as fun as being able to summon a baby with huge magnets like Thor’s hammer, but I’ll take my small delights where I can get them.