Here's the last piece of equipment for our farm-themed playground project: a swingset shaped like a horse, with a cat on its back. Apparently, they are best friends.
The heads and swings were modeled in relaxed positions. Then the whole thing was attached to a deformation skeleton, so that rotations of the skeleton's joints determine the character poses. Because this structure will only be posed once or twice, the rig controls are fairly simple.
Below are some of the design stages. The cat was originally designed to be sleeping, but unfortunately looked like an orange blob in test models.