Someone on another thread had recommended the Questionaut game on the BBC website. I did the first two levels, but, I am embarrassed to admit, I can't figure out how to get to the questions on the 3rd level. Here's the website:

http://www.bbc.co.uk/schools/ks2bitesize/games/questionaut/pop.shtml

The 3rd level is the one with all the animals on a tree suspsended in air. Any ideas?