KS2 National Curriculum Science - Keeping Healthy (5A) by CGP Books
This book contains a variety of question types covering everything 7-8 year old pupils need to know about keeping healthy, following the National Curriculum for science. It's clearly laid out with a topic per page, written in a style that is easy to understand with plenty of space for writing answers. Pull-out answers are included and there's a poster on exercise for pupils to colour in.