Features: This Optical Physics Sciences Experiment Set combines ABS and plastic construction with hands on assembly to demonstrate light refraction principles. Featuring modular components for configurations, the educational toolkit encourages creative problem solving and fine motor skill development in children. Ideal for interactive toy and optical physics props, the science demonstration set serves both homeschooling environments and classroom physics laboratories. Perfect for science projects or family, these experiment set transforms complex optical theories into tangible learning experiences. Allowing repeated use across multiple physics curriculum units and experimental scenarios. Specifications: Materials: ABS+Plastic Color: As The Picture Shows Package Weight: approx.90g Styles Optional: 2 Styles are Available as Shown in the Picture. Height: approx.170mm/6.69in Package Includes: 1 x Spacetime Tunnel Construction Set note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!