Blowing raspberries and the "Why?" and "NO!" phase

Life as a stay-at-home-mom of 2 kids under the age of 3 is amazing and challenging at the same time.  This morning, I caught this video which shows exactly that: the amazing discovery that Vidya made of blowing raspberries (or basically spitting) and the very challenging "Why?" and "NO!" phase that Keshav is going through right now :)