At the beginning of Bluey, Muffin is 3 years old and acts accordingly. In “The Sleepover,” we see her going through the struggle of transitioning to a big-kid no-nap lifestyle.

Bluey Muffin Metal Tie-Dye T-Shirt $23.12 $28.90 20% off Buy AT HOT TOPIC Bluey’s cousin Muffin is known to cause havoc on the show, ...