Now you don't have to buy those expensive pianos for your kids to teach them how to play piano. All you need is a browser and an Internet connection and you can play piano right with your mouse clicks.
Its been a while since Youtube introduced annotations and people have used those annotations in a creative ways.
Here are the top 5 virtual pianos created using YouTube and its annotations.
Make sure you let the video load completely. Once the video loads, you can start playing the tabs and listen to different notes.