If you spent your childhood in the 1970s, a lot of things probably still live rent-free in your memory. Maybe it’s the warm crackle of a record spinning on the turntable, or the satisfying sound of dialing a rotary phone. Back then, kids stayed out until the streetlights flickered on, bikes had banana seats, and Saturday mornings were sacred, reserved for cartoons and sugary cereal with no adult supervision in sight. It was a different world, one where nobody flinched at drinking from the garden hose, and rewinding a cassette tape with a pencil was just part of the routine.…