New Product. at Wackyplanet.com “Trendy Color Block Backpacks” These are bold color block backpacks for boys or girls. Color blocking is a huge trend this year in High School and College fashion. Color blocking means that you pair two or three totally different colors together to make a bold statement. These fun basic backpacks are sure to be a hit. Great as a book bag or as an overnight bag or travel bag for short trips.