it is a small cup on a stick with a ball you can throw up and catch

Supplies

3d printer and material, any kind works, i used PLA for my version.

Step 1: First Sketch

i sketched the arm with 2 circles at the end, the size does not matter but ensure the diameter of the inner circle is the same size or larger than the ball you will make later

Step 2: Extruding

extrude the arm and inner circle about 1/2 an inch

Step 3: The Cup

extrude the outer part of the circle so that it can catch the ball.

Step 4: The Ball

sketch a circle and put a line through the middle, then revolve around the center line. i put a hole in initially for attaching a string, and you can do this also.