It's like a Kinder Surprise egg, with the added appeal of letting you pretend to consume excrement! You snap together a plastic toilet, give it a happy cartoon face with the enclosed sticker (because nothing says happiness like receiving huge dumps daily), then add water to the magic shit-powder, and presto! A simulated plumbing accident that you can eat. As a bonus, the toilet is probably to scale with some action figures.
Words may not do this justice. So here is a lovingly crafted instructional video.