I'm still looking for a car for my kid (and I'd like a second for myself).

I've found a lot of cars on craigslist, but many of them are the older models.

I was keen on getting a newer one due to the fact that it's waterproof and my kids only 7.

Is the waterproof really needed?

What is it that makes the new traxxas slash, 'pede or rusler waterproof? Looking at the parts list all I see listed as "waterproof" is the servo.

Do the seal the motor or anything else?