I put it on the floor and just let them have at it. After each one of them had gotten a couple turns just standing on it, they started lifting one of their legs, holding their arms out and truly balancing.
The yoga block is soft, yet firm. It does not slip on the floor, and of course it has many more uses besides toddlers and preschoolers working on their balance. It helps with many difficult yoga moves as well as developing strength.
You can get yours here: Yoga Block by Ziloda
I was provided a discount to purchase, try out and to give my honest opinion of this product.