Hey move it, football head! You're blocking our Nickelodeon Hey Arnold! Befriend the Planet Men's Graphic T-Shirt! Head to the Sunset Arms boarding house with this tee that features Johanssen and Arnold with the phrase: "Be a friend to the planet," in an airbrush style design across the front. Earth Day is the perfect day to show off your appreciation for the environment with your favorite '90s cartoon and fun retro styles!