This a simple soap box cart that my son and I built for my 9year old daughter so she could enter the Trowbridge Carnival Soap Box derby
Step 1: Basic Frame
We used planed softwood, 2.1m x 74mm x 18mm for the frame and 2.1m x 50mm x 18mm for the front axle. The king pins for the steering will be M10 x 100mm bolts
The cross brace at the front is 400mm as is the the brace that forms the "radiator" whilst the rear is at 600mm
The wooden pole is from a beach wind break and is used to estimate where the driver will be sitting.
The body frame work is made using 25mm x 25mm softwood and its size was based on my 9yr old