Mammoth math workbook : (with a little help from some elephant shrews)
"Macaulay's endearing mammoths and elephant shrews will take you on a joyful journey through the basics of numbers, counting, calculating, measuring, shapes, data, puzzles, codes, and more! Each math idea is explained, then reinforced with practice questions and fun activities. The answers are at the back, so you can check you're getting things right." --publisher's website