If you have a bag full of felt scraps then you easily can make them useful. Depending on how many of scraps you have you can make a mat or even a rug of them. Besides them you only will need a glue gun, a lot of glue sticks and a lot of time.
The process of making such rug is simple yet time consuming. You need to roll strips into a coil and use hot glue to secure them in place. When the first of your strips is ready start the next one butting up the ends. Continue the process until your rug is big enough for you.