The names of the pictured things have something in common. When you figure out what that is, you'll be doubled over in laughter. The highlighted hint states, " I hope this doesn't take a long time to figure out." Stop reading if you don't want to know that it could take ages.
A 1 with one hundred zeros is a googol.
ears
game
pentagram
winter
whywoolyowl
It is 'saycheese'.
whywoolyowl
code
googol
googol
chess
queue
ninety
phase2
bangkok
yesterday
heart
The answer is yesterday.
yesterday
saycheese