Shopping trolley_physics

Hi guys so im trying to create a shopping trolley that can roll down a hill picking up speed as it goes … i have already built the shopping trolley but i need to add wheels that are attached to the trolley but have physics to enable them to roll … i hope that makes sense

my character will be sitting in the shopping trolley and leaning left and right to avoid objects … How would you guys go about doing this ?

That would be done like in the vehicle template.
Check out how the vehicle physics are done there.

A more challenging problem, if you want a realistic shooping cart behavior, would be making one set of wheels (the one near the handle) to be able to swivel.

No its fine it simply needs to be able to roll down hill and be able to move left and right maybe by using impulses or something .