Okay, this is an Euler's Disk.
The Big Bang Theory Season 10, Episode 16
A floppy DISK?
The Big Bang Theory Season 5, Episode 5
Oh, an Euler's Disk, fun.
The Big Bang Theory Season 10, Episode 16
can hold his breath
longer than the DISK can spin.
The Big Bang Theory Season 10, Episode 16
Okay, who had
Leonard gets a floppy DISK?
The Big Bang Theory Season 3, Episode 2