I want to buy my son a digital piano, found one that seems ok for kids https://popular.reviews/beginner-digital-piano/#6_RockJam_RJ561. Any of you ever had any experience with it or with any other model and could give me some feedback? Any help would be appreciated, TIA!
I used to have a Yamaha, with weighted keys, wasn’t all that expensive to buy, nice instrument, I bought it around about 2012 for around £240; my great nephew has it now. 
I imagine this message might be too late to be of use to you, though here’s what I found recently when looking into this myself: while not the only pianos discussed, one that https://www.reddit.com/r/piano/wiki/faq#wiki_choosing_a_keyboard seems to be in agreement with https://thewirecutter.com/reviews/best-budget-digital-piano-for-beginners/ on as a good inexpensive-ish option is the Casio Privia PX-S1000 (or the older PX-160 which it’s replacing). Casio’s compatible 3-pedal board is often sold separately, in which case the model number to look up is SP34 (or SP33 for the older PX-160, though that also requires their CS67 stand in particular I think). I don’t know where you’re located, but if you can’t find them locally then I’ve found Reverb to often have some more-than-fair (and also some less-than-fair) prices on these.
We got our daughter a casio px-s1000. The key action is very convincing, and it’s amazingly small and light for a hammer-action digital keyboard. It can be run on AA batteries, so she has been able to take it outside to play music with friends. She’s 5 feet tall and weighs under 100 pounds, but she could manage it herself.
https://www.sweetwater.com/store/detail/PXS1000BK--casio-privia-px-s1000-digital-piano-black
I’ve been impressed with how it sounds–it has two piano voicing and then an electric piano and some organ voicings as well, and I think a “strings” voicing, but its really all about the piano
I have Yamaha P45 with weighted keys. A nice option for the money, keys feel like a real piano. Can’t say more, because have a very poor experience.
Well I have a casio ap450, its the size and weight of an upright piano so it stays where it is. But I’m getting one of those Rock Jam keyboards (its not a piano) so I can practice upstairs.
If you have the money get a Yamaha Clavinova. They start at about $2500. We’ve had a few music major type pianists play ours and they both thought it was good. It responds like a piano. If you gently depress a bass key and then strike a treble key, the bass will resonate.