Attached is a toy minimum parts buggy made using under-arm roll-on, x2 stepper motors, ULN2803, bar-graph LED, 9V battery, 5V Reg, PICAXE-18M2 and some few caps, resistors, wires and IC headers.
The perfect PICAXE chip will be 20M2, as that will simplifies design and coding.
The buggy...