Tonight I attended the Tech Expo, at the Middle School... lt was so much fun.There was chili tasting.All the chili was so good.The top image is a catapult.The bottom one is of these leggo vehicles. They have infa red sensors so they can see the line and stay within the circle.There were also really cool little cars that run on co2.The fastest one in the contest went 37 miles per hour.There was one that went 44 mph.But that one didn't count.There were also mouse trap powered vehicles.One is in the top picture at the right.It went the whole length of the room and could have gone farther.I even got shoot the catapult a couple times.It was a blast.