Steve: (as a cow) Oh, look at that tower. Hey, Bessie, you gotta come over here and see this tower.
Kid: A clue, a clue!
Steve: Yeah! We make a good crew.
Steve: Hi, Mail Blocks.
Mailbox: Mail Blocks?
Steve: Oh, sorry.
Kid: No, a clue!
Steve: Yeah, Green's a demolition guru.
Steve: What do you think Side Table built?
Side Table Drawer: It's the handy-dandy notebook unloading ramp. It's like a big slide.
Green Puppy was introduced to viewers in "Blue's Sad Day." This episode reveals that she has learned from her mistakes in that episode and now only knocks down her own block creations.
Adam Peltzman's character is referred to as simply "Green" throughout the episode, but is listed as Green Puppy in the closing credits.
Mailtime Segment: Steve accidentally refers to Mailbox as "Mail Blocks," since he's been spending a lot of time playing with blocks. In the letter, a girl and a boy build a block caste. They build it very tall, so tall that it reaches above their waists. It falls over and they giggle.