My clowns and other little bottom feeders actually prefer cucumber to zucchini. I also just use a fork ... I skewer a one inch thick cross-section onto each end of the fork and leave in there for a day or 2.
My smaller clowns, All Yoyo's,Skunks and Kubs will eat frozen bloodworms straight out of my hand all of the time but my larger clowns just look at me like I'm stupid. Lately they have also started attempting to "eat" My tattoos on my wrist because they are the same shade of red as the worms lol...