The old way of opening coffee and other cans..with a "key." You had to be very careful not to cut fingers with the sharp edges on the top of the cans. I locked myself in the bedroom with one of these and had to wait for my dad to get home to let me out!
cassette tape recorder-LOVED mine. Spent hours recording off the radio. Secretly recorded my father while watching NFL games. Played back recording at table while eating dinner. Laughed at naughty language. Got yelled at by both parents.