These pens, made to promote the Hey Arnold movie, each lit up and sang a hit song in a Hey Arnold character's voice when someone wrote.
Arnold-These Boots Are Made for Walkin' (bright blue)
Helga-Stupid Cupid (hot pink)
Phoebe-Funkytown (royal blue)
Holiday Arnold-Jingle Bells (red, green and white)
Holiday Helga-Sleigh Ride (pink and white)