Product Description: ? MATERIAL :- Brass ? SIZE :- 5.5Inches x 2 Inches ? THE KALEIDOSCOPE: - Can Exercise Your Eyes And Alleviate Eye Strain. This Simple Toy Is A Great And Special Gift For Your Friend Or Children. It Is Suitable For All People, Children, Adults And The Elderly, All People Can Not See The Same Pattern, This Is The Place Of The Toy Artifact. ? USES :- It Is Used By Artists To Create New Patterns And To Draw Them, It Is Used To Get Different Glass Patterns, It Is Often Used As A Toy By Kids, Often Used To Explore New Patterns As A Pattern Never Repeats Itself, An Etched Outer Surface Really Keeps Your Focus On The Images And Takes You Away To A Happy Place. An Optic Lens Means The Images Are Crisp And Clear. Note ; you can install Any Marble of Same Size or Slightly Bigger/smaller Size Marble in your Kaleidoscope, Easy To Install mechanism ? Marble Beg Are Not Include With This Kaleidoscope