This is an improve-your-arithmetic cassette, supposedly for four to 12-year olds, though I think the stated age range is low at both ends. Six upwards, I'd say, to get value for money from the two games.

On side A is a noughts-and-crosses type game for practising addition, subtraction or both, using between one and four three by three boards. It gets quite complicated, particularly with four boards to choose from.

Side B has two options - magic squares or self test. In magic squares, a 3 x 3 board is displayed with three numbers already entered. You complete the rest to give as many rows, columns and diagonals totalling the same value as possible.

B.J.