Toy aeroplanes of yesteryear

Anyone remember the North Pacific Sleek Streeks? Those American balsa planes in a little plastic bag? And also those sharp-nosed plastic, made in Honk Kong, catapult delta gliders with either curved or square wingtips that you twanged off the end of your thumb with an elastic band? Wouldn't be allowed these days - might take someone's eye out.
Yesteryear - strange word straight out of... yesteryear.