Mrs. B. J. Gribble of Oxford wrote Mix And Match for the Electron and BBC B to help the youngest member of the family, aged three, to learn to use a computer and to recognise geometric shapes.

At the start, four basic shapes are displayed at the bottom of the screen. One is then selected and re-drawn at the top of the screen and an arrow moves along the bottom row. The child presses the space bar when the arrow is facing the shape matching the one at the top of the screen. A correct answer is rewarded with a flashing tisk, an incorrect one with a large cross.

A new game starts automatically after eight seconds and the speed of the game can be varied by pressing ESCAPE to return to the menu.