Piano

Got a piano, it was a gift from my uncle, i want my kid to learn how to play, what do you guys recommend?

Dude i think you should get lesson from a pro. Also I love playing the piano so just keep playing it and you will get better

Depends.

First, get a teacher. Don't just give a kid an instrument and expect them to learn how to play. Trust me, don't skimp out on this. A better teacher will indefinitely make a better player. Also remember that more expensive != better teacher.
Don't restrict your kid to simply playing RCM repertoires or whatever, that's the fastest way to discourage a kid from playing music, saying that they can only play certain songs. RCM is a frankly retarded organization that tries to standardize the world of music. Their repertoire is dumb boring, and although it does progressively get harder, once you hit grade seven or so, you can play most everything with enough practice as you have the ear for it and you have the finger dexterity as well.
Don't restrict the student to certain songs. Let them find a song they like and try to find an arrangement for it. If they can't, help them work it out. You don't need sheet music to play piano if you have half a brain. I like anime music. I like video game music. I like Dragonforce. I like Japanese funk and free jazz. Everything else can fuck off and isn't worth my time. Your kid will have certain tastes as well. Let them play songs of their taste.
Get your piano tuned regularly depending on how often your kid practices it (or how often you do if you decide to learn as well, I highly recommend doing so.) Makes all the difference playing on an untuned piano vs. a well tuned one. Sit around when you get it tuned, watch and listen to the massive differences in sound as the tuner adjusts the strings.
Get your kid to learn music theory. Only beginner theory is essential, like what a cadence is, chord progressions, etc. The understanding they get from this will benefit them for the rest of their lives, trust me.

Now, that's all the essential stuff. For the optionals it depends on the path your kid decides to go.

If your kid wants to play piano professionally, like as a concert pianist or some other performer, make them practice finger dexterity and sightreading. Scales, arpeggios, etc. all that bullshit. Also focus on some more hands-on music theory or skills such as recognizing an interval by ear and playing back a melody. Ear training is a must.
If your kid wants to go into composition/production, music theory is the main focus. Good, hard, chord progressions, chord fattening, perfect/plagal/imperfect cadences, writing simple melodies to follow progressions are all a must. I also recommend picking up either guitar or drums. Maybe not both, but definitely helps if you have that behind you (I played guitar a bit, not great with drums but I do use drum pads every now and then for fun.)
If your kid wants to teach and make some extra money, finish RCM grade10. Trust me, it makes all the difference if you have the document. I have it, I hated getting to it as it took me almost 15 years (you can do it faster if you play more often, I hated the repertoire so I hated practicing, now I play whenever I can because I like the songs I play.) You'll need at least some of the skills required above. Also costs quite a bit of money for all the exams.
If your kid wants to just do their own thing or quit, fucking let them. It's not your decision, and if they're really negative about doing what you want them to do and you're just forcing them, they won't be successful and they'll just end up hating playing the instrument.