Set of four density blocks for physics and science education. The set includes an iron cube, a copper cube, an aluminum block, and a wooden block, all supplied in an attractive plastic storage case for neat storage and transport. Designed as physical experiment equipment and a physics teaching instrument, the model is easy to use, easy to understand, and built to last. Key benefits Handson learning: Lets students and instructors explore density and specific gravity using real materials instead of just theory. Clear material identification: Differences in mass and volume make it straightforward to identify each material by calculating density or using displacement methods. Durable and reusable: Metal blocks and a solid wooden block withstand repeated classroom use. The plastic storage case keeps components organized and protected. Simple setup and compatibility: Works with standard classroom lab tools such as balances, graduated cylinders, measuring calipers, and water for displacement tests. Portable and convenient: Compact set stored in a plastic case for easy transport between classrooms, labs, and demonstrations. Important attributes Contents: four blocks consisting of iron cube, copper cube, aluminum block, and wooden block. Storage: attractive plastic storage case included for convenient organization and protection. Function: designed for density and specific gravity experiments, material identification, and physics demonstrations. Construction: metal blocks for iron, copper, and aluminum; natural wood block for contrasting density behavior. Performance: stable, repeatable results when used with standard measurement equipment and common lab procedures. Typical use scenarios school physics class: Students measure mass and volume to calculate density, then match calculated values to the blocks to identify materials and reinforce the concept of specific gravity. College materials lab or introductory materials science course: Demonstrate how material composition affects density and use the set to compare theoretical densities with measured values. Science fairs and classroom demonstrations: Use the blocks for live experiments such as water displacement, buoyancy demonstrations, and comparative mass exercises to engage audiences. How to use 1. Measure mass with a balance. 2. Determine volume by geometric measurement or water displacement. 3. Calculate density as mass divided by volume and compare results to known material densities to identify each block. 4. Store blocks in the included plastic case after use. This density block set provides a practical, durable, and easy to use toolkit for teaching and learning core concepts in physics and material properties.