
I have no desire
to engage in the ACTIVITY.
The Big Bang Theory Season 4, Episode 20

It's interesting but isn't ventriloquism
by definition a solo ACTIVITY?
The Big Bang Theory Season 2, Episode 13

But what about a recreational ACTIVITY?
The Big Bang Theory Season 2, Episode 13

He's gonna go through that
ACTIVITY book in, like, 30 seconds, so...
The Big Bang Theory Season 6, Episode 24

Now, try to increase
your alpha-wave ACTIVITY.
The Big Bang Theory Season 1, Episode 3