Science project help me! TEN POINTS!?

my friend is doing a science project for school. I need to help her find a project she can call her own. This is an engineering project so we have to have it be something she can make up. for my project i made a collar that says what dogs think (as seen in Up) Please help her. anything that has not benn invented yet and anything that is not in the proccess of being made. it needs to be something MADE UP and it does not have to me recycled. JUST AN INVENTION LIKE A RANDOM INVENTION LIKE AN AUTOMATIC PIE MAKER OR A FLASH LIGHT ON A SHOE SO YOU CAN SEE IN THE NIGHT. PLEASE PLEASE PLEASE HELP. :D JUST USE YOUR IMAGINATION! BUT IT HAS TO BE SIMPLE TO MAKE :D IT ALSO HAS TO BE A LITTLE REALISTIC