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Business: Drive-Through
kit that turns shopping cart into electric car.   (+4)  [vote for, against]

Battery goes underneath with two friction drive motors that attach to back wheels. which allow left right forward or back motion. front wheels drift in any direction as you would expect. Driver sits in cart and controls via blutooth ap. Steering is achived by powering on the left or right motors. kit comes with a livetime warranty or 3 months which ever comes first.
-- bob, Nov 24 2018

Clean-up aisle twelve!
[2 fries shy of a happy meal, Nov 24 2018]


Maybe a small amount of weaponisation, too.
-- FlyingToaster, Nov 24 2018

...which of course inevitably leads to the shopping-cart monster-truck.

-- 2 fries shy of a happy meal, Nov 24 2018

Would help amateur Mad Max fans recreate their favorite scenes, in the car park...
-- not_morrison_rm, Nov 24 2018

You'd have to stop the rear wheels castoring, otherwise it would just go in random directions.
-- pocmloc, Nov 24 2018

And that would be a problem, would it ? Shopping cart dodgem cars, hmmm ...

The motors and powerpack from a "hoverboard" could be a good starting point for the propulsion system.

Oh, and what [FT] said ...
-- 8th of 7, Nov 24 2018

random, halfbakery