Few teachers would debate the merits of hands-on science. But Lee Gibbs, ringmaster of the Big Bug Show, offers children the opportunity to handle cockroaches, giant millipedes and huge snails. The star attraction is a tarantula which regularly makes attempts to escape from its tank. The show combines comedy with science, and pupils are awarded stickers for each invertebrate they are willing to handle. Edible grubs are also provided to snack on after the show.