The first of April has long been a day for practical jokes and silly pranks — and there’s no escape from April fools on the internet. Companies like ThinkGeek regularly announce fake products on April 1st, only to have customer demand push those jokes into production. It didn’t take long for companies to start using the prankster’s holiday as a soft test bed for silly ideas. That’s how Hyperkin announced the SmartBoy — a gamepad case that lets your smartphone play real Nintendo Game Boy cartridges. Two years later and Hyperkin’s ridiculous April Fool’s gag is actually a real product — and, believe it or not, it’s actually pretty cool.