Design Tech - Need 1 more idea..

Hey,

For my DT project i need 6 ideas of things to invent. The general theme is Handheld, that can be like ergonomic things and can cover a fairly wide range of stuff. I have things like a key ring and an ergonic univirsal tv remote(i can nick the electronics out a brought one), which fits your hand, also a toolbox. But i really cant think of my last idea, can anyone think of somthing not to hard to make...

Thanks for any pointers,
TNT

Some cars have an alarm system that opens the locks when you press the button. How about one for the home / office door? (too hard?)

Something to do with all the dud CD's I have collected / made over the years. I use some as fishing lures and drink coasters.