This is another magical idea of a DIY felted ball mobile
Here is the list of materials you will need. Wool roving in various colors, embroidery thread in different colors, clear fishing line, dish soap, 10” embroidery hoop, scissors, sewing needle, a hot glue gun, and glue sticks, of course. To begin, fill a mixing bowl halfway with hot water and add a small amount of dish soap. Dip a small tuft of wool roving in water and roll it between your palms for several minutes until the ball forms.
Continue to add wool to the ball until it is about 1” in diameter. Squeeze any excess water from the ball and place it on a towel to dry. Repeat this step until you have 13 strands of felted balls.