For those above normally strong, strength athletes, these heavy-duty, sand-filled med balls from Perform Better take your ...

Here's how to get more bounce from a normal tennis ball - buddy it up with a heavier ball for twice the impact. Hold a ball in each hand and decide which ball weighs more (has greater mass).

The 3D printed arms are controlled by beefy stepper motors running at 60V. To stop the balls from bouncing around in the arms, [Nathan] included and electromagnet to hold the balls in place for a ...

There’s still one small mystery, however. Every now and again, [T-Kuhn] says that the ball will bounce in an unexpected direction. It doesn’t seem to be a bug related to the platform itself ...

Table and legs easily folds into a carrying case w/ locking latch & handles. Attached, foam pong ball holder under the table w/ (6) PartyPong balls. High quality pong balls have excellent bounce.