The adult asks the child a loaded question about her toys. She responds, as any child would, with a simple answer. The adult then corrects the child and proceeds to wax philosophical about how her toys, and thusly the other objects in our lives, are ultimately just the sum of their parts. He then adds that these parts can be reused upon the disassembling of the object.
The last three panels show the child, presumably at the DMV, looking at her toys and deciding to opt in to the organ donor program. This is humorous because the adult’s lecture has led her to think of her organs as Lego bricks - to be disassembled and reused upon her untimely death.
