In this Computer tutor program Clever Clogs comes on screen flashing "Hello': giving his name to the accompaniment of music and asking for your name. Music announces instructions, which take up six screens. A menu offers choice of Whacky Blockbuster - where the computer explains how to go about it; Blockbuster - where you play; and Blockbuster Quiz - where answering 12 questions correctly allows you to see one way to complete the puzzle.

Layout, colour, sound, graphics and movement are superb making this program a pleasure 10 play and addictive. The object is to make a rectangle out of 12 blocks. A box is provided to enable you to nip a piece over, and the five levels are sensibly labelled from easy, to almost impossible (other programmers lake note) and relate to the rectangle's shape.

You can quit at any time - or save a completed puzzle on tape - and are then offered replay or end program facilities.

This program, for age 7+, stretches the brain and teaches shapes, relationships and coordinates. A useful facility is that the questions can easily be altered. A prize is offered to those who send in two answers to level four.

T.W.