I currently knit and spin, and occasionally dip into fiber dying, sewing, jewelry-making, quilting, and paper crafts. I've cross-stitched and also dabbled in many other needlework crafts, usually following my mother's lead. But she did the scherenschnitte by herself (intricate German paper cutting http://en.wikipedia.org/wiki/Scherenschnitte). It looked crazy to me. I've also gardened, ice skated, roller-bladed, and was a roller skater as a kid. For a while as a youth then in college I was a runner, long-distance. Oh, and there's this RenFaire thing--I've done some serious costuming for that.

My father was a model railroader. He probably still would, if they had the space. He also keeps a garden.

My husband is a gamer (D&D) and a Builder of Worlds. And plays computer games along those lines. And is an overall history buff.

My son takes karate, and swimming, and is getting into Boy Scouts. He is also a Builder of Worlds, using his model trains and matchbox cars and whatever else is at hand to build Walt Disney World one weekend, and the Cars2 race the next (it was epic--ranged all over the house). He is also not afraid of the glue stick or construction paper, or even yarn, if it serves what he wants to do. I'm not sure if any of this counts as hobbies on his part yet, but I think he will have a good foundation for whatever hobbies he chooses.