Introducing our Glass Block Semi Circular, perfect for all your science experiment needs! Measuring 90x18mm, this block is just the right size for little hands to handle and explore. Each unit comes ready to use, making it easy for kids to dive into the world of light refraction and reflection. Whether they're creating rainbows or exploring the principles of optics, these glass blocks are a must-have for any budding scientist's toolkit. So, spark their curiosity and let their imaginations soar with our Glass Block Semi Circular!