Police and the Abington Heights School District have not disclosed the origin of pot-laced candy that five high school students brought to school last week.

Yet the incident offers a cautionary tale about the brave new world in which marijuana has become legal for recreational use in Colorado and Washington. It also is likely to be legalized in up to seven other states over the next four years.

In Colorado, where marijuana sales are booming, the marketplace also offers pot-laced snacks, including candy.

Legal access to the drug also has created a new industry, marijuana tourism. Available tours include the "Colorado Cannabis Sampler," another that claims to emulate a Napa Valley wine tour experience, and another that includes a stop at a glass-blowing shop that fashions customized bongs to order.

Sampling weed while visiting states where consumption is legal is not without risks, however.

It's still illegal to transport it across state lines and to use it in most states, regardless of where it was purchased.

And if your workplace has random drug testing for marijuana, it's good to remember before consuming it that, unlike alcohol, it is detectable in the body long after its effect on the brain has ended. THC, the chemical in pot that produces its high, binds to fat cells. The metabolic process produces identifiable chemical byproducts that are detectable in urine for as long as a month.

So, if it's off to Colorado for a ski trip or another experience in the mountains, it's probably smart to get high on the scenery. And be extra careful in buying souvenirs.