Cut open the ball somewhere around the U-shape curvy point with your pen knife, about 2 cm high (left & right). When you think you have cut deep enough, just squeeze the ball a bit and it will pop open.
Let’s make the eyes and teeth! It’s a bit hard to see but, here goes the felt measurement. The eye consists of 3 circles. Big white piece dia. 4 cm, blue (green) piece dia. 2 cm and black piece dia. 1 cm. The row of teeth is 10 cm long and 1 cm wide. Cut the bottom half into a row of triangles. Make two for the teeth.
Glue the teeth to the opening. The bottom row is a little hard to see when you hold the ball this way. But when you squeeze it, it will be visible.
Stack the eyes and glue them together. Now glue the eye and cut another piece of white circle (with the same size as the big white circle for the eye). Cut into half and fold into a cone, applying glue as you fold. Repeat for the other half.
Glue the cones to the ball to make the horns. While the glue is still wet, bend the top part a bit. And we are done with our Mike! You can fill it with anything you like, coins, paper clips, rubber bands, etc.