Ideas for WebQuest

I would like to do my Webquest on mathematics because that is my emphasis area. I am an elementary education major so my two ideas are dealing with money or an adding WebQuest. With money I could have tasks dealing with recognizing coins and making change for a dollar. With adding I could have tasks where the students use items to add and then another task where they just have the numbers. I feel that both of these areas are very critical in mathematics at the elementary level, which is why I chose them. I plan to expand on these ideas or maybe even combine them in someway.