For fun, for a nominal fee, I do bug exhibits a couple times a year for a botanical garden bug event and two northern Ohio metroparks bug events (the one last month had 5,800 visitors). For the last 10-12 years as part of the display I have included a "cockroach petting zoo" -along with the various invert displays. The petting zoo is just a plastic shoebox with some small petting zoo signs. Originally hissing cockroaches were employed but were switched over to death's head cockroaches on the second year because the hissing roaches climb out of the cage and require constant supervision. The cockroach petting zoo is probably the most popular part of the display and certainly the most interactive!