One thing that I love about the website is the real-life pictures that are sent daily with an application based story problem.
It even breaks down the questions into differentiated groupings: "Wee ones, Little kids, Big kids."
Then they have a video portion that kids just love! When you click on the video, it has a funny story that sets a scene. Then it asks you questions and lets you pause while you solve. Below is a link to a video segment I show at my trainings. The kids think its a riot!