What are bubbles?

I took this picture this summer of my grand daughter, Katie Rose.  She was outside on the deck intently watching her cousins playing with a bubble wand, making all kinds of bubbles.  This was new to her and she is really studying the whole affair.  I was sitting inside in front of a screened window.  I took the picture anyway, I wanted to capture the look on her face.  It is one of my favorite pictures of Katie Rose.  It is so exciting to see little ones discover what we take for granted.

She has since mastered the art of making bubbles, it is one of her favorite past times!  She and their 14 year old "Sheltie" chase bubbles all around their deck now.