We love the song "Slippery Fish" by Charlotte Diamond. So we made some of our own. I filled up balloons with water. The kids drew their fish faces on them. Then we put them in the sensory tub. I let the kids squirt dish soap all over them and inside the table. We used a lot! I added a tiny bit of water. The kids had so much fun trying to "catch" those slippery lil' guys.
When they squeezed them just a little bit, the fish would go slipping around the tub. We also had races by sliding them down the sides of the tub. Good, clean fun!