For reasons explained below, a legal loophole makes delta-8 THC, a psychotropic isomer of delta-9 (the real stuff), perfectly legal. Kids can (and do) buy it. But there is very little of delta-8. You'd need a hemp farm the size of Jupiter to harvest enough. Enter the chemists. It can be made from CBD, but look out - the reaction is a mess so whatever is being sold as delta-8 is often a complex mixture of chemicals, some of which are unknown. Users should be aware that they are playing "Chemical Russian Roulette."
9-delta THC
It is virtually impossible to walk a single block in New York City without seeing stores selling CBD oil. The Drug Gods haven't frowned upon CBD yet because it won't get you high. But CBD frequently contains delta-9-THC, the primary psychotropic component of marijuana, and that will get you high. Can CBD oil get you in trouble? Maybe.
Our drug laws are almost supernaturally stupid. Part of this, aside from that they're largely made by morons, is the lack of knowledge of even basic chemistry, which could, at least, introduce a little sanity to the process. Here's a bit.