Here's a quick lesson from your favorite Nick shows -- SpongeBob SquarePants, Henry Danger, Loud House, Game Shakers, TMNT, Nicky Ricky Dicky & Dawn, Thundermans and more! YAD SDRAWKCAB YPPAH!! That’s backwards for 'HAPPY BACKWARDS DAY!!’ Do you know how to spell backwards? Well, it's time to learn! KCUL DOOG!! Catch more of your favorite shows on Nick! #BackwardsDay #HenryDanger #GameShakers #NickyRickyDickyDawn #TheThundermans #TheLoudHouse #Alvin #AlvinAndTheChipmunks #SpongeBob #SpongeBobSquarePants #TMNT #Nick #Nickelodeon Subscribe if you love Nickelodeon and want to see more! at.nick.com/Subscribe Nickelodeon is the number-one brand for kids with original cartoons, sitcoms, movies, award shows, products, and more! Here on our Nickelodeon YouTube channel you’ll find the shows and animated series you know and love like SpongeBob SquarePants, The Loud House, Teenage Mutant Ninja Turtles, Henry Danger, ALVINNN!!! and The Chipmunks, and more! You’ll also get exclusive acc...