From the Crazy-Bones Pedia listing:
This is a series of 6 figures (Nelly, Natalie, Ned, Nathan, Nancy, Nick) released by Moose Toys in 1997. They were released as part of the Fidget Range.
The manual reads They're funny little folks who love to play games including Funny Flip, Jiggle Juggle a Mad-Muti player game you just have to try! Game instruction printed on the back of pack.
They also released Glitter Knuckleheads, transparent colored figures with glitter inside.