There are plenty of good ways to improve grip strength for climbing. The best way is to get out and climb. If you can't get out to a local crag or gym, investing in a small indoor bouldering wall in your basement or garage is the next best thing. If that is too expensive, you can get get a hand exercise ball pretty cheap,
Just like any physical activity, it works your muscles, gives your body exercise, acts as a break from all the other crap you deal with on a daily basis.
On the other hand if you don't know what your doing, and aren't with people who do know, you're liable to really hurt yourself... so it depends on your perspective.
Rock Climbing includs Hand Strech, And Leg Climb
Yes, bush babies (galagos) "urine wash" by urinating on their hands and feet. It it thought to be a scent-marking behavior, but it may also improve grip.
Yes, you need a very good grip to climb.
there are lots of workouts hich can increase your grip but doing climbing, biking or anything you need grip for can help.
Chalk
It helps it to jump by having better grip on the branches while climbing.
Arm muscles, leg muscles, grip in your palms and fingers, to a certain extent your ankles, and sometimes your abs, it depends on how your climbing it.
Of course
tape gloves
to improve and get a grip
It helps it to jump by having better grip on the branches while climbing.
they give you better grip
climbing shoes grip the wall/rocks better than just normal shoes - eg. sand shoes, thongs, boots, high heels!. the climbing shoes are made of a special sort of rubber that is made specifically for climbing. you can get many different sorts of climbing shoes, you can get shoes for cracks, friction climbing, face climbing, pocket climbing, climbing walls (indoor). you have to choose the right shoes to suit what sort of climbing you are into! good luck finding a pair!