On the lower end, you will notice that the plastic keys have “synth touch,” which means they have no weight to them. However, when a child or adult learner decides to formally study piano (usually with a teacher), they should avoid the cheapest keyboards. The lowest end instruments, such as Casio’s SA-46, may be fine for a 4 or 5 year old to have fun with. As you might imagine, no single instrument fits everyone’s needs or budget. Keyboards and digital pianos come in many sizes and levels and they can range from mere toys to impressive professional instruments. What Should You Look for in a Keyboard or Digital Piano? Having a keyboard that mimics the function of an acoustic piano is vital. Dynamics will be harder to produce, keys may be missed due to being used to another weight of keys that is unlike an acoustic piano, and tone quality may be poor. And if you do anything in the way of events, recitals, group classes, talent shows, or even playing for fun in the back of a favorite bar, if the acoustic piano feels too foreign then the results will be frustrating. When the keyboard is not realistic enough (meaning, it is not enough like an actual acoustic piano), your learning may be hampered when performing live on an acoustic piano. Some of the requirements to look for are weighted keys, real-size keys, at least 61 keys (but preferably 88), a sustain pedal, touch-tone sensitivity, piano action, well-sampled piano sounds, an adjustable stand, and an adjustable bench.
Most importantly, however, as you begin learning how to play the piano, you should have a keyboard that feels and sounds as much like a piano as possible.