There are many great WebQuests for the classroom - any classroom! Students can undertake a WebQuest once they have learnt to read right through to Year 12 and beyond!
I have seen teachers make marvellous WebQuests for Kinders - Year 3, because they have taken the trouble to add audio to the text of the WebQuest. In fact, it is a great idea to add audio to WebQuests for older students as well! It certainly aids students understanding if you can give them the content in different formats.
This is a simple process to do! Go and have a look at 7 Tips for Using Audio on Your Website
Also, for something a little different, think about adding an avatar who can "speak" to your students on your WebQuest - have a look at the following site: Voki: it's free!