◆商品名：Eulers Spinning Disk オイラー スピニングディスク 並行輸入品 Toysmith Euler's Disk Spin science into art;You won't believe your eyes or ears;Disk will spin faster and louder the longer it goes;Just give it a spin and gravity does the rest;A hypnotic display of light and sound;Patented 3 diameter chrome-plated steel disk;Creates a hypnotic display of light and sound as it rotates;Includes Disk, 9 concave mirror base and 9 pieces of holographic foil;Foil is magnetized