Description Upgrade 2 Power Modes : Solar mode:Use a solar panel(included) and it requires direct sunlight to generate sufficient power to move.Battery mode:Use 1 AAA Batteries (not included). So from this time on, kids dont need to choose weather, choose location, it could play indoors and outdoors, rainy or cloudy, to play it, just enjoy it at your time and mood. 12 Different Types of Robots : 12 different building robots which can move on land or wate for your child to build, two levels as to complexity, starting from entry level for younger child to advanced level for older child to challenge their manipulative skills.This is a great way for your child to get started in robotics toy. DIY for Creation : Improve your child's imagination and creativity by challenging them to build their own robots with 190 easy-build pieces parts & accessories. We include guide for 12 robot designs in details from level 1 to level 2, easy to build as guide step by step.STEM Education Toys : This science toys will teach children how to engineer a robot that uses solar power, while help to develop manual dexterity,problem solving skills, improve logical thinking,self-confidence and promotes the importance of teamwork & collaboration. It is also a perfect toy to encourage learning of mechanics and engineering in young children,enhance your children's Science, Technology, Engineering, and Math skills.