What is this?

[skyfaller]

I'd like your help with figuring out what the objects in these pictures are, because I am puzzled by them.

What is this inflated ball thing? Taken in 30th Street Station in Philly, while waiting for the R3 back to Swarthmore.

What are these circles on the ground? This was taken out of the window of my plane from San Francisco to Newark as we flew over the midwest.

What is this insect? Taken in Mertz 2nd South's men's room.

If you can explain to me what any these things are, you win a hug! Or a Gmail account, or any token prize you might find useful.

Comments

[skyfaller]

I guessed as much, but I was hoping for a more interesting explanation ;-) Come on, be creative!