Fun stuffed

Who knew?  Teddy bears are lethal.  (So far as I know, only in Fallout 3.)  You fire them out of the Rock-It Launcher.

There's a Sewer Waystation near Grayditch with a pair of conveyor belts filled with teddy bears — by my count 21 of them, but I may have missed a couple (or other stuff.)

I took them up to Mothership Zeta and dropped all 21 bears in the bridge nook for Sally, but they all merged into one or two bears for some reason.  There's a clean, secluded space in front of the Captain's chair, down a short flight of stairs on port or starboard.