You have a bouncing ball, you have a USB key. You can make a bouncing USB key. Here's what we used:
As seen from above, this smiling bouncing ball is the perfect sized object to hide your USB key in:
Remove the case from the USB key. We first tried to use a box cutter, but it was unsuccessful and very hazardous.
Finally, we used a vice and our bare hands to break it, and we got this:
Then, start creating a slit with a box cutter, just at the top of the head of the ball.
Make it deep and deeper. Don't be afraid to use force: look, it's still smiling!
Check the size of the hole, and sometimes check if it's deep enough by trying to insert the USB key.
If you find difficulties inserting the key, just use a screwdriver, which can be more convenient to finish the job.
When you have the perfect hole, sink the USB key into it, and you should get a ball looking like this:
But don't forget to put on your hat if you go out!
As you can see, the bouncing USB key is fully functional...
... and is really working as a USB device!
As a bouncing USB key, it has to bounce. And it successfully does it, as you can see on this video: