OP, I live in Columbia Heights. I was able to purchase a special "Bad Child Meter." Basically it's a lot like the wand that you see used in airports. We love it and have used it many times when our kids (ages 10 & 7) have asked for a questionable play date. At pick-up, I just ask our child to point out the child she wants to play with and then I go over and swing the wand in front of the classmate.
We ended up purchasing 2 wands, and I'd be happy to sell you one of them. We can meet up at The Coupe. Just email me at
racist@gotohell.now