Preliminary evaluation of Prima-Hedron play structures for non-human primates (1990)

O'Neill, P. L., Novicky, P., George, E.

Abstract

Description of commercial roto-molded polyethylene structures serving as swing toys. The Prima-Hedrons' greatest virtues are that they can be assembled in so many ways that novelty is not restricted, and they can therefore maintain the interest of the monkeys using them longer than other structures lacking modification capabilities.