Assembly

Five Balls (Pelikan)
Five Barrels
Five Intersecting Tetrahedra
Five-Piece Solid Block
Five-Piece Solid Block
Fool's Cube
Four Legged Stand
Four Piece Box
Four Piece Dodecahedron
Four Piece Pyramid
Four Piece Tetrahedron
Fourpence
Fractal Puck
Frankenstar
Fric Cube
Fun in peaches
Funny Farm
Gamesters of Triskelion
Gamla