Study the theory of solar energy with the help of our solar panels. Educate childen on the importance of energy and how to use solar energy effectively. The product includes: -Student workbook -Teacher guidebook (digital file available only) -Gigo e-learning service -Smart manual APP Battery requirments: No batteries required Set of: 237 pieces Models: 20 (16 models + 4 creative works) To Build Size: 440 x 210 x 240mm Age: 7+ Warning: CHOKING HAZARD - Small parts. Not for children under 3 years What's in the box Set includes: - 237 Pieces to make 20 Models