Caveat, I'm an adult. I just bought scores... traditional/folk tunes tend to have easy melodies, then they have books of sheet music for beginner/intermediate

Caveat, I'm an adult. I just bought scores... traditional/folk tunes tend to have easy melodies, then they have books of sheet music for beginner/intermediate levels at most stores that sell music books. Sightreading books once you get to that level -- I found playing "new stuff" motivating and there are beginner ones. There's software (like Synthesia) but I didn't find it that useful. If you get a digital keyboard they sometimes have tutorial modes that include interfaces to show you what to play -- didn't find that super useful either once I could read sheet music, which was very fast. Yousician is an alternative which does present sheet music and it's super gamified. However, in my experience, it was hard to translate the game to playing independently; I had no memory of any of the notes I played, and I would play them fast, but it would be hard to rewind and redo a section if I made a mistake. Fun game though. You'd need to play scales and chords every day -- probably a motivation app can help with that. One thing I do is mix it with improvisation -- I practice 4-5 scales and chords in them and afterwards it gives me new ideas to improvise. I don't know if your teacher encourages improvisation since it's not targeted practice though. I don't have a teacher and I'm not planning to ever play at a concert level, but do want to get better composing, so for me it's more important. If for a child, place the piano or keyboard someplace in the house the child can just sit and play, and never, ever tell them they are making too much noise (or buy them headphones). There are ear training apps, they actually work, and I think ear training is pretty much always useful, so it could be a 5min "workout" in between practices. I don't do it myself I just listen to music I like and try to reproduce sounds without the sheet music, but I do listen to a lot of piano music for fun, so the app may be easier for directed practice.