locking manual passenger windows

[Miss Jo]

Hi All -

I'm looking for a new car, and due to my son's profound learning disability, this time I need it to have lockable passenger windows. he likes to wind them down and try to lean out to shout at the traffic with excitement!! It's obviously very distracting and I have to stop to wind them up. I really wanted something quite small but they all seem to have wind up rear windows. Other than taking the handles off, is there anyway you guys know of locking them?

Thanks

Miss Jo

[Miss Jo]

thank you