Appropriate grades or age groups:
Any

Estimated time to complete this project:
1 hour

Materials:
Yardstick, notebook, calculator, graph paper.

What is the hypothesis of this science project? What does the experiment aim to prove?
Do boys or girls have faster eye-hand reflexes?

Instructions:
Have test subjects hold their hand straight out as if to pull on a door knob or shake hands, with the open fingers making a letter "c" shape as seen from above. Suspend the yardstick so the zero inches mark is just above their fingers. Without warning, release the yard stick so it falls vertically between the subject's open fingers, they try to grab it the instant they sense it has begun moving. Measure how many inches it fell before being stopped by the grab. Do each child 2 or 3 times, use the calculator to average the inches, A+B+C divided by the 3 tries. Write the average for each subject on a notepad. Shorter inches = faster reflexes. Graph the boys versus the girls. Who's REALLY faster? Try kids versus adults! Kids who play video games versus those that don't?