£7.99
Write-on / wipe-off, double-sided KEY STAGE 1 MATHS booklet and pen - heat sentitive ink hides the answers. When you rub the black boxes with your finger pad, the answers are revealed. They disappear again after four minutes. Addition, Subtraction, Times Tables and Division for 5 to 8 year olds. Practise doing your sums, again and again on the go.
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