Description Features: brand new and high quality Assembly STEM Toy: The STEM toy have a detailed list of accessories, fun assembly with awesome stimulation of kids interest, learn and understand the principles of mechanical transmission and connecting rod transmission, well exercise childrens hands-on ability, encourage and enhance brain development, improve their hand eye coordination as well. 2-Mode Power Supply(Solar Battery): The toy power supplied by solar energy/battery,built in 3.3 million UF super-capacitor, which can store electricity to drive two driving modes: solar energy and dry cell, which can assist kids well familiar with the principle of solar power energy, with great brain development and science recognition about principle of photoelectric conversion. DIY Science Toy: The building blocks require great patience, kids need to concentrate to the DIY science toy, through playing to improve their building skills, evoke kids concentration and with good stimulation to educational training for kids. Qualification Material: Made by quality ABS plastic, smooth edges as well as wear-resistance, non-toxic and safe friendly to your kids, 3D cutting pieces ensure the playing experience. for Ideal Gift for Kids: Suitable for kids as birthday gifts, Christmas gifts, and follow the instructions to finish and DIY the robot dog,let them understand the conversion and storage of electric energy. Specifications: Product Dimension: approx. 12 x 6 x 7.5cm/4.72 x 2.36 x 2.95 inch Material: ABS Plastic Net Weight: approx. 214g/0.47 lbs Suitable Age: Age over 6 years old Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 x Solar Robot Dog