Balloons in the park

This afternoon, instead of working on either of the two articles I'm supposed to be writing, I went to the Botanical Garden in Golden Gate Park to bask in the sunlight. While I was sitting on a bench I watched a family arrive -- mom, dad, a little girl of about 2 in a bright red coat with long frizzy blond hair, and a boy of about 4. They went to an open grassy area and the parents started blowing up five-foot-long balloons. Then, without tying them off, they started letting them go. The balloons flew around randomly, sometimes zooming straight up in the air, sometimes skimming over the grass. The kids were captivated and delighted and chased them, trying to retrieve the deflated remains. This went on for a long time; the kids never got tired of it, and everyone else in that part of the park was enthralled watching them.