Angus from Maker's Muse online built a robot with a ruler as a weapon and named it Measured Response. 

And i had a spare ruler...

I present to you... UNMEASURED RESPONSE

With a 14 inch long body and huge tires, he's super imposing until you see he's just made of spare parts hot glued together to a ruler

he kinda just spins around but its the longest fairy weight i can build with a straight face.