This year marks the 40th anniversary of the Summer Of Love. Here are a couple of links that will recreate some of the experiences of that period in history.
First this link will take you to a page that will ask you to stare at a swirling object. If you follow the instructions you will actually illusinate for a few seconds. Don't worry, I have done it a few times with no flash backs.
Next, this is a link to a performance of America's premiere psychedelic rock band, the Vanilla Fudge. I don't think anyone hit the drums as hard as Carmine Appice did.