Gear Recommendations
Here's a guide to the essentials your student needs for successful lessons and practicing. My recommendations for accessories are not brand-specific, so feel free to buy something similar instead.
Piano
Keyboards: Any Casio CDP or Casio Privia. These are full-size keyboards with weighted keys and are perfect for beginners.
Accessories:
Bench or chair. Stack blankets or phone books to adjust the height. There is a guide on height, distance, and posture at the beginning of the Primer Level Lesson Book and the Adult Level 1 Lesson Book.
Keyboard stand. There are lots of options, including X stands and table stands. It's personal preference!
Music stand if there's not one built in to your keyboard
Guitar
Instruments:
1/2 size - Yamaha JR1 Mini Folk Guitar
3/4 size - Orangewood's Mini Collection
Full size - Orangewood, or buy in-person at Guitar Center
Accessories:
Ukulele
Instruments: Caramel Concert (23") or Tenor (26"). I've noticed they change their product listings often, so if those links don't work, just search "Caramel ukulele" on Amazon. Caramel also offers acoustic-electric versions.
Accessories:
Ukulele strap: pegs or single clip or two clips. Use a strap with clips if your instrument does not have strap pegs.