This is why I question the whole retail market for these products. I don't think anyone would find a suspicious substance in their kids room and then rush to CVS to buy a kit to test it. First off, everyone knows what marijuana looks like and if you find a bag of green stuff you pretty much know what you have.
I also question schools doing testing like this? I think this might cause legal ramifications. If a school finds a suspicious substance won't they call the police?