The trick is not to rely on new technology. That doesn't necessarily impress younger students. The solution for engaging children and sustaining their curiosity is to engineer situations where they will be challenged, surprised and yes - kept in a constant state of suspense.
Sometimes it is as simple as changing the format of a lesson, or altering the layout of a classroom. Sometimes it is to introduce a new approach or problem where students need to take an alternative role. I often create chaos and uncertainty in my lessons. People are not comfortable with this, and will do anything to resolve it into something meaningful. The answer is always, always keep them guessing - and then send them out confused, if you have to.
It's a natural human phenomenon that occurs when our curiosity is activate and engaged learning and assimilation takes place. It's a creative dynamic that is essential to foster for our well being.
When a child drives you crazy with "Why?", I guess that is a good thing. :) -Lon
Dont answer your own questions. Make the learners do the work, they will enjoy it.