As a kid, I was fed the tales of Santa Claus, the Tooth Fairy, the Easter Bunny, and --to a lesser extent-- ghosts, and leprechauns (and their pot of gold at the end of the rainbow). I know that there are other stories perpetuated that I may not have personal experience with, so I'll keep the language of the questions open.
1a) Were you convinced by your elders that fictitious characters and/or events were real, as a child?
1b) What were they?
1c) From what age till when?
1d) How did you find out the truth?
2a) Do you intend to perpetuate the stories? (Or have you already?)
2b) Why or why not?
3a) Can this caliber of "fantasy fun" be taken too far with children?
3b) If so, how?
Please contribute any additional thoughts on the topic you'd like.
I know this topic has come up in the past within related discussion, but I'd like a current roll-call of opinion on this topic explicitly.