This is great!!
Want to be a librarian for a day?? Chances are you won't be doing all three of the items listed. (Fielding questions, doing storytime, selecting materials) Though I suppose a children's librarian might do all three in a day.
Doesn't anyone want to be in Technical Services for a day? The romance, the intrigue, the thrill of unpacking boxes, barcoding items, data entry, staring at a computer screen for 6 hours a day? We do have candy...
Or you could be sys admin for a day! You can solve computer problems while listening to people tell you "I didn't even touch it!"
7 hours ago