This is a 360 degree ramp for Sphero with a sweet spot in the middle. Use some tape on the bottom side to keep the ramp from sliding on smooth surfaces. . Now you can come in at any angle when trying to get airborne! Good luck ;) . If you don't have one see http://www.gosphero.com . UPDATE: So far I've been unable to get Sphero to stop on top and ramping is challenging. I plan to make a couple more tweaks to make this more versatile. . UPDATE: Just uploaded RevC... It's awesome. So far I've found about 30% speed gets you up the ramp and in the center.