I can tell you that getting an RGB keyboard is not a great idea. I learned that from experience.
In my own experience (of exactly 1 child), teaching him to understand what's ok and what's not ok to play with is important. We felt, from a distance, a hot stovetop well after the burner was off, touched the edge of a knife to see how sharp it was, etc. We lived in a city, so we got to see, in person, cars running lights and getting into an accident (look both ways, even with a walk signal!).
I also let him participate in the button pushing with guidance. Kids want to do what you're doing, so making that as real as possible is a good thing. In my case, I had an only laptop kicking around. It could do some web games and looked and felt similar to what Daddy was using.
Give them video games. Problem solving, and creative button mashing as a must if you want to be good at a game. Then slowly extend to things like old laptops (get them to help you switch out the hard drive), etc.
This is a great way of putting it and something I haven't thought of before. Mostly, I have been guarding my 2yo from pushing-all-the-buttons because I'm scared of her breaking something expensive (air purifier) or hurting herself (elevator). But I want to foster this sense of creative exploration.
She has taken a lot of interest in my Macbook (lots of keys to press, and she sees me using it) but zero interest in the cheapo tablet I bought her.
Any advice?