It was 'Bobby Knockers' in Swansea, it still is. Other games Hide and Seek, Devil up the Drainpipe, Dandies (what we called fivestones),lots of others.
Anyone else make throwing arrows? A length of bamboo about 15 ins long with a headless nail stuck down one end cardboard flights at the other and launched using a knotted piece of string, dangerous!
Built a wall across a building site once, not very high only about 4 bricks but across the width of the access road. That was fun.

Mike