Weight training is not gonna make you to muscly.. you cant really target any specific part of your body doing cardio and other workouts work everything out.
stand in place with your arms out, and turn them one direction and back a hundred times, then reverse the direction, then do it all again with your arms dropped to your side... your arms should tone after awhile of doing this ... this is easy to do while watching tv
i guess u can just do some pushups every now and then. it wont be enough to make a bunch of muscle but it will probably get some weight off it.by now and then i mean maybe 2 times a week, its wat i do and it works for me.
get some 5lb dumbells and workout with those. also do upper body aerobics.
tricep workout
dumbbells
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workout jsut dont over do it everytime u work out work a diff muscle