The Piggyback Brigade

From BoardGameGeek:

The merry trunk gang consists of seven multicolored piglets, who love nothing more than running through the meadows - on roads, which are so narrow that they cannot pass the other pigs - except, if they stand on top of one another! Naturally, they know how to do this, as they are not normal piglets, but genuine circus piglets! And even if they do not run a race, they gladly demonstrate acrobatic exercises or set up themselves in marvelous pyramids. After the board has been constructed, players' take turns rolling a special die numbering 1-4 and moves his pig based on the number he rolled. If a black number is rolled the player may get to take another turn. If you land on the same space as another pig you now move with the bottom piglets piggyback style. Once a player makes it to the end of the track is declared the winner. Ages 4 and up.