It’s hard not to laugh when you see Leonard Nimoy as Spock smiling at a practical joke on the set of Star Trek TOS. The crew had secretly made his son Adam up as a Vulcan child to surprise him. We can only bring this to you because super fan birdofthegalaxy, Tom Redlaw, has been scanning and restoring 35MM film cells from blooper reels and other outtakes into sharable pictures. There are a staggering number of behind the scenes Star Trek shots on his Flickr page.
Source Flickr / birdofthegalaxy