Messing with your Holga or Diana toy camera can be rewarding if you don't destroy a dozen of them trying to get the modifications right. Because of the plastic nature that makes them so fun, it also makes them fragile, so at all times have good hobby glue like Testors since Crazy Glue eats through the body and some good tape, especially gaffer's tape. Duct tape is as usefule as a sticky candy wrapper, so I would suggest never even owning a roll it is that useless. Duct rhymes with fucked for a reason.