Here is another fitness trainer that takes your balance to the next level. The CobbleFoam simulates walking on uneven terrain. You can perform walking, hopping, lunging, and other moves on it. You get a pair of boards with a 16 x 16″ EVA foam base. They have 8 short and 8 tall blocks that can be moved to form different patterns.
You can use multiple boards together for more advanced training. The CobbleFoam board has a non-slip bottom for safety.