This c. 1940s game has an unusual mechanism: competitive jig-saw! The game consists of six similar jig-saw puzzles. The images are the same, but the piece shapes for each puzzle are different. Each of the 36-piece puzzles has a row of frogs, alternately jumping and sitting on lily pads. When completed, they measure 23.5" long by 2.5" wide. As soon as the start signal is given, each player tries to complete his jig-saw as quickly as possible, and the first one to finish wins. Alex G. Malloy (American Games) has a listing for "Jig Race by Arthur Dritz" (p. 79, #2988), by the same publisher, which either is his record of this game or represents another version of it.