It's interesting how some of our views of the natural world change as we age, and Summer, I think, embodies many of those changes. For example, Summer is when little creepy crawlies return, and as adults we often think of them as mostly pests to be avoided. As kids, however, bugs and insects are fascinating and to be collected, and none more sacred than the firefly!
I'm imagining a backyard at dusk, just when the fireflies are beginning to emerge, and 2-3 kids have run off to the background to catch them. The main focus of the scene, though, is the foreground: a picnic table top strewn with glass jars and such containing various bugs and insects that the kids had collected earlier.
