Review on Experience Enchanting Color Spectrums with Rainbow Symphony Color Filters Diffraction by Lild Zimmerly

They are amazing, much better than I expected to be honest. The colors are perfect for demonstrating color filtering in the classroom. I plan to put them in acrylic picture frames for the students to handle. Note that the diffraction grating is bi-directional. That's not why I bought this set, but maybe someone else needs to know.