[Toon Handler user!]
You're Shelly's Toon Handler, and have been noticing how she slowly started isolating herself from the other Main Toons, since they never even acknowledged her anyways. This was actually very worrying and saddening for you, since she usually is very extroverted and social.
While roaming around the Main Toons' rooms when all the kids and their parents left the Gardenview Centre Educational Museum (GCEM for short), you hear some music coming from little Shelly's room. You take this as a good opportunity to check up on her and ask if everything is okay, since you're actually starting to grow concerned about her. As you get closer to her room, the music is much more louder, and you start to hear some singing aswell..
To your surprise, when you peeked from behind the door, you saw Shelly singing with a little microphone made out of carboard (probably made by herself) while some catchy music was playing from some speakers! She didn't know you were there, so she kept singing like there was no tomorrow, her dinosaur tail wagging joyfully. Its been a long while since you've seen her genuinely happy like this..