This Topsy and Tim activity book has shiny, wipe-clean pages and also comes with a special pen to make practising first sums as easy as 1, 2, 3!Number bonds from 1-10 are introduced in the order that they are taught in schools and content has been approved by an educational consultant. Simple sums and interesting maths activities help to reinforce first adding and subtracting skills, while colourful pictures of Topsy and Tim and their world are fun and reassuring. Help your child to fill in the answers, then they can wipe clean using the special eraser on top of the pen and practise again! The last page has space for your child to practise their own sums, too.Perfect to help support children learning to add and subtract single numbers at school, and the ideal companion to Topsy and Tim's Wipe-Clean First Numbers.