Raging Rapids is a nicely designed tile puzzle by Thinkfun (formerly Binary Arts). It consists of a raft and twelve paddlers. The paddlers are supposed to fit inside the raft, all facing the same way.

Each paddler has on its base a rectangular tile, with dents and tabs along the edges so that it is shaped a bit like a jigsaw puzzle piece. The raft has a large rectangular floor, also with dents and tabs along the edges. The paddlers are marked on the bottom of their tile by a unique letter, ranging from A to L. The raft and the paddlers are shown below.

In case you want to place the pieces back into the packaging, the arrangement used in the packaging is reproduced in the next picture. Note that the red rope lies on the right, and that paddler B in the top-right corner is the only one facing left. In the packaging, paddler B is actually placed in a separate compartment.

There are two challenges. The first is to get all paddlers in the raft facing in the direction of the red rope. The second is to get them all to face the other way.

It is actually a little tricky just to get all the paddlers in the raft regardless of their directions.