砖
=
专
+
石
:
The scientist (专) and Julian Giant Squid (zhu) are standing next to a rock (石) in front of the anthill (an1). They are quietly thinking for a long time, until the scientist has an idea and tells Julian Giant Squid what to do in order to create bricks (砖) out of the rock (石).
lit. throw out a brick and get jade thrown back (idiom) / fig. to attract others' interest or suggestions by putting forward one's own modest ideas to get the ball rolling