Here are some online music Resources for you look at
Chrome Music Labhttps://musiclab.chromeexperiments.com
This one is completely free , very basic and a great music programming.
You can create your own melody and rhythm and save the pieces that you created.
These three are the best:
Ten Pieces at Home is simple, fun, creative activities for primary children.
The activities are easy to follow and do not require any specialist knowledge or equipment. Each activity is led by an artist or specialist in their field and offers different ways to get creative with classical music.
Amped StudioAmped Studio
Amped Studio is a modern web based music studio. With instant access to virtual instruments, effects, loops and easy to use tools to make music right in your browser.
-Compose with your voice HumBeatz
Hum the melody on your mind and easily turn it into notes. Record your beatboxing and turn it into drums. The exciting new feature brought over from HumBeatz app allows you to create music with nothing but your voice as the input