Itstooearlyforgin - further to the poo just after bedtime. If you are old enough to get out of your cot/bed and have worked out how to access your nappy, it is very helpful indeed for you to take off the pooey nappy and put it on the floor. You can then wipe your bottom on the carpet/rug/chair and go back to bed with your pooey bottom.
This ensures that when mummy comes to check you at her bedtime she will have every chance of stepping on the pooey nappy, and will then have to get you out of bed and clean off all the now dried-on poo, before putting you back in a nappy and clean pyjamas, and changing the sheets before putting you back to bed - probably nicely awake and ready to keep mummy and daddy awake too.
As a variation, after you have taken off your pooey nappy and wiped your bottom on the floor etc, you could get a nearly full, huge tub of sudocrem, and coat yourself and the carpet and furniture with 75% of the contents. Then daddy can have the fun of trying to scrape sudocrem out of the carpet and off the furniture, whilst mummy takes you and showers you repeatedly in order to try to remove the oily stuff!!
Older children - if you are sleeping in a top bunk bed, and happen to feel sick, there's no need to get down and try to go to the bathroom (or even the waste paper bin). If you throw up from your top bunk, you can splatter vomit all the way down your bed, your brother's lower bunk bed and your baby brother's cot - and down the back of the radiator, if you really try.
Mummy and daddy will have such fun cleaning that up!!