Sphero Bolt Range - Sphero PP02ROW, This SPHERO Bolt Power Pack lets you plug in, power up and roll out. This kit lets you charge, store, and carry 15 Sphero BOLT robots. It has an integrated cooling system so your robots can charge safely all from one place. With a recommended 2:1 ratio of robots to students, this pack offers plenty of opportunities for creativity in any setting you can imagine. With more robots, a longer battery life, auto-aiming, and more, the BOLT Power Pack is the top of the line kit for educators using the Sphero Edu program in a classroom, robotics club, or in any maker environment you can dream up. Plus it's loaded with Turbo Covers, maze tape, and protractors, so the activities can get started anytime, anywhere. Sphero PP02ROW Sphero BOLT Power Pack