My favorites:
- The Frank Zappa poster (he was an outspoken atheist)
- The young lady who’s demonstrating the scale of the trippy “wall n’ ceiling” poster
- The headbands
- The hefty price of the black light fixtures ($17.95 is about $105 in today’s money)
The ad is from a 1971 Co-Ed magazine via Phoney Fresh.
2 Warps to Neptune 
The “Don’t Eat Yellow Snow” patch – another Zappa reference?
Those are all ecology patches, so not sure. Is it an idiom, like “look on the bright side”?