Yeah Dude..! Thank you for that valuable information. I have still not made the body.! I will be soon doing it. But I can show you an example picture I got from the internet(This is definitely not the exact picture of what we are doing, atleast approximate to cure your blindness).
It is more or less like this one.! But we might use a hard plastic body with ample weight as the body if we find the metal body too costly.!
I'll just jist out my project in short.!
What I am trying to do is a fully automated robotic arm which has 4 wheels for moving to and fro. I'm equipping it with either an infra red sensor or an ultrasonic range finder that'll be used to find the test object placed some feet away from the robot. After sensing it the robotic arm moves on its own, picks up the test object and if needed will come back to the original position. All are automated. This is the main aim of my project for which I need a lot of help. I loved PICAXE above everything else(be it Arduino pro or RPi(I know it's more sophisticated)) so I resorted to select this as the brain of my project. Yes I might need to make one side of a motor run at a time facilitating turns and steers. PLease help.! THank you.! And I might need a lot of help with coding too(Please guide, I do not ask to give me the complete coding). Thank you.!