There's a lot going on in this picture, so we're going to break it down for you piece by piece. The vehicle in the background, believe it or not, used to be a school bus. Someone's done a lot of intricate painting work on it, and also fitted a sky-dome. Whilst that's quite an achievement, we're not sure what benefit it brings, or why it was necessary. We also don't know whose children are in the picture, but we hope they're not getting involved with what's on the bus.
The man in the hat - and his friends on the bus - are members of the Merry Pranksters. They were members of a commune who followed the works of American counterculture author Ken Kesey, who allowed them to live in and around their homes. Wherever you saw their legendary psychedelic school bus, which was named 'Further or Further', you were welcome to hop on board with them and take some LSD.