I would like to buy keyboard for my son to practice her piano. Any recommendations ? I would like to buy a normal range as he just started the lesson. He is 7 years old

You can check out Yamaha or Casio. They both carry quite a wide range of keyboards. Look for portable keyboard as they are for beginners. As for myself, I bought the yamaha PSR-E353 for my son :) http://asia.yamaha.com/en/products/musical-instruments/keyboards/digitalkeyboards/portable_keyboards/?mode=series#tab=product_lineup http://www.casio.com/products/Digital_Pianos_%26_Keyboards/Portable_Keyboards/