Letting children apply painted handprints to the bathroom wall not only personalizes the room for them, but also serves as a reminder to wash their hands. The handprints can also be a lead-in for activities about a child's growth. For example, let a child make wet handprints on paper towels after washing them, and compare them to the painted handprints on the wall.
If you are using cloth towels, use fabric paint to decorate the towels with handprints, or let children draw a picture on the towels. Each time they use the bathroom, they can enjoy their own artwork or that of their preschool friends. If you don't want handprints painted on the wall, paint them on fabric or paper, and then hang them as decorations.
Especially effective for little boys, targets in the toilet are an easy and inexpensive way to make the bathroom fun. Targets in the toilet can be as simple as a piece of cereal, or a small cut circle of toilet paper or thin tissue paper floating in the water. Targets make it fun to aim, but also serve as a good reminder to flush the toilet. Children who are learning to count can practice by counting how many circles the target makes during the flush cycle before it disappears.
A very simple way to make a preschool bathroom fun and enticing for children is through unusual lighting. Children love to experience something new and different, and lighting is an easy and inexpensive way to do it. Consider installing a light-up faucet that turns the water different colors as it flows, or a ceiling light with a cutout shade that casts patterns on the wall. Even short strands of Christmas lights strung around the perimeter of the ceiling can create visual interest for young children. Use the lights to teach about different colors, and to remind kids to turn the lights off when they leave the bathroom.