Kids and cleanliness may not be common synonyms. It is possible, however, to keep kids’ bedrooms in relative good shape if you treat stain and dirt aggressively and make sure things are cleaned on a regular basis (rather than waiting until the place looks like a war zone). A good way to do this is to keep a cleaning cloth handy and to wipe off spills and stains as soon as you see them. You can also teach your kid to do it by keeping a cleaning cloth handy and telling him to use whenever something spills.
Because young kids tend to explore the world by putting things in their mouths, avoid using chemicals to clean toys. Instead, use a cloth wet with warm water (and maybe a few drops of chlorine) to wipe off or disinfect things. To remove stickers from walls, carpets or products, use WD-40, Ben Gay ointment or fingernail polish remover. Apply over the area, let sit for a few minutes and then scrub with a plastic sponge. End by wiping the area with a wet cleaning cloth.