T4 is a phenomenal educational toy gift, powered by a natural green energy source of sunlight. T4 Robot kit can transform into Robot, T-Rex, Drill Vehicle and Rhino Beetle for entertainment and fun. Just under the sun, Amazing T4 is to transition to multi-robot style with extraordinary movements beyond your imagination Explore STEM Discipline: This STEM toy offers a chance to teach children how the motor is activated by solar power to work and the mechanical transmission knowledge acquired from its different movements. Learn about renewable energy: The educational toy will assist your child in discovering and exploring the limitless possibilities of solar energy usage in product design while developing basic engineering skills. No batteries required: With the solar-energy-focused design, these fascinating robots can move easily and provide great interaction with your child for days. Box Dimension: 8.5 x 7 x 3 in