I went to an after school program for knitting when I was 10 and I learned there and still remember how to do it. Initially learning it was difficult, especially because I am left handed and the teacher only taught right handed...so I had to do everything opposite. But once I learned it was nice to do, it does take a lot of concentration and patience (in the beginning). So its up to you. My sister has a super short attention span and she like crocheting better (she would just make a giant rope...it was useless but it kept her hands busy). My great aunt loves crocheting, she has made everyone in the family numerous blankets and scarves, she even made a snowman decoration for my family...You could always take a class on each of the things your interested in and choose which you like best after.

Other things you could think about doing is gimp (if you don't know its plasticy string and you can make key chains and stuff with it, I personally and great at the box knot...thats it http://en.wikipedia.org/wiki/Scoubidou ) or make friendship bracelets. Just some ideas.