I used these in a construction themed sensory table for my daughter to play with while we were learning about it. We used play sand and small pebbles on one side and stones and water on the other. These vehicles are very well made and durable enough to go through both the sand and the water. They still worked great afterwards. She liked being able to push to wheels to control the height of the vehicles and giving them a slight push sends it driving across the room. She has also played with these on hardwood and tile floors as well as a rug in her room.