This is a very playful 20 minutes to wake up your abdominals and upper body. The exercises during the first half of class are done on a thinly rolled yoga blanket or towel. This will create a less stable ground and a more challenging position for the back of the body to balance on. Your body will need to rely on the abdominals to keep you from tipping over. It should look a little something like this (but with the blanket roll underneath your spine):