Gaming has long been a favorite of many people when it comes to technological hobbies. The investment is usually as simple as just downloading a few low end games.
geocaching
playing baseball is a good hobby for a baseball fan..
There are many good online hobby shops, depending on your area. You can search this forum for one nearby. http://www.rcuniverse.com/forum/m_5631668/printable.htm
Hobby Town offers a lot of good hobby supplies. You can also check out Hobby Lobby for more.
a good hobby is playing card such as 21 ( black jack)
Probably the best improvement you can make is with the graphic card. Typically, a slight change there can do more good than a big upgrade of the processor.
Anytime, if you want to have it as a career, i would suggest you take it as a hobby as a kid, then take highschool classes involving that.
There is a lot of good things about a hobby, but bad things are you get addicted and you can spend a lot of money on what every your hobby is.
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Craft and hobby stores such as Hobby Lobby and Michaels have a good selection.
As technology has moved on from 8 - bit the only use for it now is hobby
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