This Topsy & Tim activity book has shiny wipe-clean pages & 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 & content has been approved by an educational consultant Simple sums & interesting maths activities help to reinforce first adding & subtracting skills while colourful pictures of Topsy & Tim & their world are fun & reassuring Help your child to fill in the answers then they can wipe clean using the special eraser on top of the pen & practise again! The last page has space for your child to practise their own sums too Perfect to help support children learning to add & subtract single numbers at school & the ideal companion to Topsy & Tim's Wipe-Clean First Numbers