"Signs" that I'm still 16 years old

I decided I wanted to make signs to hold up while driving in my car. The reasons are two-fold:

1. I have a 16 year old's soul (so what who cares... I think It's funny and sometimes/ more than you would think, I see hotties driving and I want them to call me, maybe...)

2. also, people need to know their blinker is on or that I caught them picking their nose! ;-) 

Have any other good ideas...?