In "Mouse Trap," players roll to advance their mouse tokens around the perimeter track, building a wacky 3D "mouse trap" as they go. The end of the track forms a six-space continual loop with one Turn Crank space and one Cheese space. When a mouse lands on the Turn Crank space, the player turns the trap's crank, which triggers a stop sign to swing a boot that kicks a bucket that dumps out a metal ball that rolls down two tracks that bumps a vertical arm that prods a plastic ball that falls through a bath tub to land on a see-saw that flips a diver into a bucket attached to a pole that suspends the actual trap over the Cheese space. The last untrapped mouse wins.
Originality = A: I know of no other game that involves constructing an elaborate and working "machine," giving "Mouse Trap" high marks for its uniqueness.
Parts = B: Decent quality plastic parts fit and work well together, though some of the pieces (such as the boot sign-post I had to super-glue or maybe the gear prongs) and the gameboard slots they fit into might not survive rough handling.
Challenge = D: No danger of analysis paralysis or brain burn here, even by kid-game standards, since the game plays the players without allowing any choices. Younger kids may find putting the trap pieces together challenging, but it not the fun kind of challenge.
Fun = C: Especially with two players, the end game can go on maddeningly long trying to get one player on the Turn Crank space at the same time the other player is on the Cheese space. This and the luck factor interfere with the real fun of setting the trap off.
Replay = C: Replay value is limited. Kids young enough to find the game itself fun will have trouble putting the pieces together. Kids old enough to construct the trap easily will quickly tire of it, cute as it is.
Overall = C: "Mouse Trap" is a better novelty toy than a game and is best enjoyed just building and setting off the trap. Get it used if possible and keep it set up for a while each time, because your kids will soon tire of it, especially if they have to set it up to play.