Features: 1. Puzzle and Entertainment: This toy is designed to provide puzzle and entertainment, helping children develop focus, spatial cognition, and hand eye coordination abilities. By building blocks and balancing the swinging process, children can learn and grow while playing. 2. Multi functional design: Toys can not only be used to build Russian building blocks of various shapes, but also swing through subtle balance adjustments, allowing children to exercise balance and finger flexibility in games. 3. Stacking Height Challenge: This toy comes with multiple blocks of different sizes, allowing children to freely stack heights according to their preferences and level of challenge, increasing the difficulty and fun of the game. 4. Cultivation of focus and concentration: By manipulating and adjusting building blocks, children need to invest their attention and concentration to maintain balance and stability. This helps to cultivate children's focus and concentration, and improve their thinking abilities. 5. Safe materials: Toys are made of safe and reliable materials, which are non-toxic and harmless, and do not contain harmful substances, ensuring the health and safety of children. Specifications: Ability to cultivate: emotion, vision, intellectual development, hands and brain, grasp, sensory, hand-eye coordination, other ability to cultivate, interactive toys, parent-child communication, interest cultivation Material: plastic/plastic 3C configuration category: plastic toys under 14 years old Plastic material classification: ABS Net weight:0.07Kg Color:As shown in the picture Number of pieces:0-38 pieces Packing: pp bag + carton Package Includes: Russian Jenga*1 set Notes: 1. Please allow 1-2 cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.