Just tidy!
Honestly that’s all you need to do… Just pick things up, clear the floor and any surfaces they’ll be cleaning like the bath tub, the kitchen bench, window sills, that kind of thing.
If you make a it one of your daily habits it won’t be a big job on the day.
Kids can do their own rooms, even if they just pick everything up off the carpet and dump it on the bed. We all know it’s not ideal but at least the carpet will be vacuumed!
