It’s almost that time of year to deck the halls, light the lights, get in the Scooby snacks, and celebrate the most magical time with your very own groovy gang. Let us provide you with the ideal tee for your Christmas parties, in the form of this seasonal Scooby Doo number we’ve designed. It features a printed illustration of Scooby and Shaggy at the wheel of the Mystery Machine, with their Christmas tree loaded on top, and the slogan âGroovy Holidaysâ!