Do I need to buy two kits?
No, not unless you want to have one set of TouchPoints on while you are charging a spare set. Depending on the settings, TouchPoints should last several hours on one charge. Some children affected by autism, or people going through an incredibly stressful time in their lives, opt to buy two kits so they can charge one set of TouchPoints while they use the other set so there is no interruption. Most users opt to use TouchPoints for short periods of time throughout the day so TouchPoints last all day for most regular users.