This is a perfect first welding project because you can make lots of mistakes and it will still come out fine.
Step 1: Find some scrap nuts and bults
note: do not use galvanized nuts and bolts because they give off poisonous fumes when you weld them.
all the parts you need are shown below:
Step 2: Make the fingers and thumb
The photos show the fingers already attached to the hand, but that's just because i forgot to take a photo before I attached them. At the end of this step you just have 5 loose fingers.
The carriage bolts are nice because you can choose the curve of the finger joint more easily and they look a little better. You can still choose your finger curve with a normal bolt but it is not quite as nice looking.
Step 3: Make the palm of the hand
Step 4: Attach the arm to the palm
Step 5: Attach the fingers and thumb to the palm
Look at the various photos throughout the project to see the angle and spacing for the fingers and thumb. Of course you can choose your own finger layout!
Step 6: Welding completed!
Enterprising medical students will notice that my anatomy is not entirely accurate. Real fingers have 4 segments, the first of which is inside the palm. Isn't it funny when fake reality looks more real than the real thing?