Not mine, just a result of the right google words 🙂 I suspect this was toward the toy end of the market as your first picture shows everything (speed control, receiver etc. ) on one board. Hobby grade cars have them separate so that you can upgrade or replace them.
IMO if this has sentimental value it could be possible to replace the electronics but if you simply want to build a car with your son something well supported like a Tamiya TT02 might be easier.
+1 for a picture of the steering setup.