Inside the large box are four tubs of odious goo together with a plastic (safe) syringe and gruesome accessories including jelly-like sticky body parts and maggots. The accompanying "Dr Gross Slimology" booklet gives various suggestions, tips and advice on how best to use the Congealed Blood, Glowing Ectoplasm, Putrid Puke and Pot of Poop for playing pranks on unfortunate victims. All very stomach churning, very mischievous and, consequently, hugely appealing to children.