The Tumbling Fish are available in two stackable sizes. The low one is for children who have just learned to sit; the big  one is for older children; stack the two and they fit teenagers and adults. The Fish grows along with children, allowing them to use the Fish over a long period of time. Kids can roll the animals to one another, or roll and chase them. The size of the six-layer Fish allows a child to sit on it even while it is moving , which enhances the child’s balancing skills. Children can lie across these Fish and have the backside of their bodies strengthened, and children can exercise their arms through the pressure from their own body weight. Launch date: September 2008.
— "The tumbling animals can be used as furniture, but [are] meant for play. The whole idea is to enhance children's motor skills while playing!" Director Mette Dyhrberg of bObles told TDmonthly.