Fee-Fi-Foes

Brendan came to me this morning asking if he could play with these fee-fi-foes.  I had no idea what he was talking about until I looked down and saw that he was holding some small figurines in his hand.
At Christmastime we were invited to a party at the house of one of the doctors that Neil was doing his clinical work with.  They generously gave each one of the kids a present.
Brendan came home with 3 G.I. Joes that night and loves them.
But he just can't seem to remember what they are called.  Fee-fi-foes?