Sphero started with a smartphone-controlled ball that could roll around and glow and play a few basic games, but its really picking up speed with its latest toy: a smartphone-controlled cylinder called the Ollie. That may not sound that much more exciting, but the new form makes a huge difference. The Ollie has treads wrapping around either end of it, effectively giving it two wheels. The Ollie is by far a less casual toy than the original Sphero, but the company also makes it look like the Ollie will be a lot more fun to drive around.