Blowing and Bouncing On Inflatable Beach Ball

Sarah is eager to play with her inflatable beach ball.  She blows it up as tight as it will get.  Sarah enjoys rubbing her hands on the plastic and hearing the noise it makes.  She sits on top of it and starts grinding and bouncing on the ball.  She reinflates it when it looses air.  Then she gets back on top and continues to ride her favorite ball.