To make reviewing fractions fun and memorable, I taught the fourth and fifth grade how to play Fraction City.  Each student built a game board (see picture) by folding "streets" into specific fractions.  First street had no fold and was marked "1/1."  Second street had one fold in the middle and was marked "1/2" at the fold and "2/2" at the end.  Third street was folded in thirds, marked "1/3," "2/3," and "3/3" and so on through all of the streets.

To play the game, students each had two toy cars for markers.  I'd call out, "Drive two blocks on Fourth Street, and one block on Second Street."  The object of the game was to see which car went the furthest.  Notice that one block on Second (1/2) is equal to two blocks on Fourth (2/4 or 1/2).