"With Soundtrap you make music online. You can plug in your own instrument, use the software instruments available in Soundtrap or just record a song directly with your computer microphone. It's super-easy!"
Hub for searching the internet for copyright-free content: images, music, videos, etc. Type in your search term(s) -- e.g., cute adorable kitten -- and select the platform you want to search (e.g., Flickr, YouTube, Soundcloud, etc.)
...you're welcome.