Hopping Good Transport

Outer space is very big, and sometimes it can be quite tiring just finding places to explore. An explorer's feet are his most valuable asset. I was giving mine a well deserved rest when I saw a most peculiar sight. It was a strange bouncing thing, following by more strange bouncing things. They had large tails, and it wasn't until I saw their pouches, and the little passengers inside, that I realized what these bouncing things were - transportation systems!