Kids learn about circuits, current, connections and parallel connections safely. Furthermore kids can design their own electricity generator. The product includes: -Student workbook -Teacher guidebook (digital file available only) -Gigo e-learning service -Smart manual APP Battery requirments: Requires 2 AA/LR6 batteries (not included) Set of: 156 pieces Models: 20 (16 models + 4 creative works) To Build Size: 440 x 210 x 240 mm Age: 7+ Warning: CHOKING HAZARD -Small parts. Not for children under 3 years What's in the box Set includes: 156 Pieces to build 20 Models