The pudding mix Stu buys is called Duffy's Pudding Mix. This is a reference to the segment's director, Jim Duffy.
The scene where Stu is making chocolate pudding has become an Internet meme.
One of Cheryl Chase's favorite episodes.
When Tommy makes a sculpture out of his alphabet blocks, one of the stacks spells out "RUGRATZ" upside-down.
When Stu tries to put Angelica's statue back together, he fails and passes it off as abstract art, calling it "Angelica Descending a Staircase." This is a reference to one of the most famous works of abstract art: Marcel Duchamp's "Nude Descending a Staircase."