Have fun sticking, clipping the modular sound generators to the inside of the car.

Modules:

A whistle via tube clipped to open window or air vent moderated by sprung opening,

A glopping made from water in a pendulum, with spring swing adjustment and sound amplifying opening.

A drumming from of a small drum with adjustable skin tension and a choice of various bouncing weights.

A clash from a small cymbal hit by release of a spring which has a period due to ratcheting.

A wheeze from a reed instrument powered by weighted bellows.

Just ask mum or dad to speed up or slow down. Sometimes breaks will need to be used.
-- wjt, Jul 12 2020

It sounds like a metal symphony to me. Make road trips more interesting. "Guess what sound that was?"
-- blissmiss, Jul 12 2020


I like this. [+]
-- doctorremulac3, Jul 12 2020


if the sounds were of a lowish amplitude, kids might have to keep quiet to listen. I don't think they'll break out in song but you never know*.

* there's always one.
-- wjt, Jul 13 2020


Composers could compose symphonies or chamber works for this.

The score would be in the form of a rally driver's course notes.
-- pocmloc, Jul 13 2020



random, halfbakery