Looking for "Work Books" for my 4yo DS

[CDMforever]

Have used the Maths and English Carol Vorderman series which went down well.
Anyone used any another series?

Schofield and Sims - they are not as colourful as the Vorderman ones - white paper with usually blue print for that age I think, but they are cheaper. 2 of my children liked them and 2 didn't.

My DD likes the WHSmith range.