We're just not whipping out the banjo like we used to. Reg Speller/Fox Photos/Getty Images Summer has officially begun. Summer vacation these days looks quite different from how it did in the 1920s. Kids used to play sports in the streets, explore on bikes, or play on "dangerous" playgrounds.  Summer vacation used to mean two months of freedom: pools, playgrounds, and hours spent hanging out with your friends. But for Gen Alpha and the youngest members of Gen Z, summer is starting to look a li