The bubbles are created by spittle bugs. Some unfortunate critters have gotten stuck in the mess. The top insect looks like a small wasp. The winged creature below is most likely a moth fly. The bug to the right maybe a plant bug of some sort. Spittle bugs eat plants, not other insects, so I guess they'll be spared that fate at least.
This is most likely a plant bug. Not sure what kind.
Again, most likely a plant bug. Possibly an alfalfa plant bug.
This shot was taken in my back yard. It's a spider having breakfast!