HOTTEST NEW for Physics . . .SALE $8.50 . . .1-2 week of ENGAGING FUN!!! Build this 16-foot MONSTER acceleration race ramp, Students design, build, test, modify, then RACE to determine the FASTEST car. Students are challenged to determine the fastest speed and acceleration on this track . . . without the teacher telling them anything. ALLOW 4-meters for run distance and 50-centimeters for room at top for start line. A EXCELLENT teaching tool. Winners can challenge other PHYSICS classes to build and race the fastest car. HURRY This hottest new SALE will not last long $8.50.