They make a mess of it each day, so why not leave it a mess when no one is there?
I found a trick that helps a kid make a bed in no time.
I've made ribbons on the top of the sheet and the bed cover and I tie them together after washing the bedwear and making the bed after that for the first time.
All the children have to do in the morning is to find the tied ribbons, look at what side of the bed they belong, and pull them to the top.
Looks great such a nice bed!