This bionic robotic arm kit offers an engaging way to explore mechanical principles and engineering concepts. Made from durable wooden materials, it provides a stable structure for long-term use. ideal for stem project, this hydraulic arm kit allows kids to simulate biological movements, enhancing their understanding of while fostering creativity and problem-solving skills. Features -Color:Light Yellow -Material:Wood,plastic -Size:21.00X19.00X1.00cm/8.25X7.47X0.39in -Realistic mechanical principles: the hydraulic robot arm kit accurately replicates mechanical principles, offering an engaging stem project toy for kids to explore engineering concepts hands-on -Durable construction: crafted from sturdy wood, the wooden robotic arm ensures use, making it ideal for science project robot arm experiments and educational activities -Enhances patience: the diy robotic arm kit requires precise assembly, helping users develop patience and concentration while building their own mechanical hand stem toy -Biological motion simulation: the bionic robotic hand design mimics biological movements, sparking curiosity in and encouraging scientific exploration through interactive play -Ideal for sharing: with multiple sets included, the hydraulic robot arm toys are great for collaborative learning, allowing kids to share the fun with friends and family Package list: 3 sets x hydraulic robot models