One to Ten and Back Again, by Nick Sharrat and Sue Heap

A colourful counting book which i particularly like because of the diversity of the illustrations. It includes lots of interesting things such as ice cream, various animals (including crocodiles), fruit on trees, boats, cakes (real, proper cakes which DD can now name, such as 'chocolate eclair' and 'battenburg', lol), and right at the end, a hundred stars.
I haven't come across another counting book yet that i have bothered buying.