lol,
k its very easy, face palms of hands towards sky, make a fist with hands ( works better I u have a stick with a lil weight, like an iron rod or sumfin ) and curls hands towards you then back into original position. try it, ull feel sumfin happening to ur forearm muscles even without weights.
yoh this exercise can burn those muscles good. its quick, easy and effective
remember the muscle gets bigger during relaxing period, so have a 2-3 day break before exercising the same muscle again <- this goes for any muscle being trained.
I get it

Jzk for your reply.