Record your kids ‘play’ soundtrack
Children often create and perform their own background music when playing with toy cars or lego. Record these compositions and play them back to them when they are older – they may want to expand on the piece when they learn to play an instrument or get famous!

Little about it on the web tbh – but…”Humans are the only primates that make music. But the evolutionary origins and functions of music are…”
Like this idea, and thought about it myself with our boy. Couldn’t find anything on the web about kids doing the audio track for their games but it is a thing, and a good thing too… https://www.brighthorizons.com/family-resources/music-and-children-rhythm-meets-child-development#:~:text=Music%20ignites%20all%20areas%20of,and%20the%20mind%20work%20together.&text=Dancing%20to%20music%20helps%20children,them%20to%20practice%20self%2Dexpression.