What is the actual difference in the TA, PA, and XU robot kits?
The TA, PA, and XU robot kits ALL have the same parts; they are just in different stages of the building process. TA stands for Totally Assembled and means the product is totally assembled, tested & ready to use. PA stands for Partially Assembled and means the robot’s microcontroller is assembled, tested and ready to use, but you still have to assemble the rest of the kit (and do the hacks). XU stands for eXpert Unassembled and means the product is totally unassembled, you have to do everything.