Here's my problem. I take my son to kindergarten in Brooklyn on a trail-a-bike. I drop him off, lock up the trail-a-bike at his school and then continue on to work. On my way home I pick up the trail-a-bike (he's already gone home on the bus). The problem is that I have no place to leave the five foot or so safety flag and it's impossible to lock it up. Someone somewhere must make one that folds or telescopes. Anyone have any thoughts on this or how to improvise something.