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Your cart is empty.Fun with Diffraction Gratings!! Preprinted Rainbow Peepholes. Always in stock and ready to ship. The ideal teacher incentive. Great in the classroom when a quality diffraction grating is needed for the study of Light and Color. Just look through your Rainbow Peephole at any light source...the rainbow starbursts will amaze you! RAINBOW PEEPHOLES: 13,500 Line/Inch Diffraction Grating - 1 11/16" Diameter, 1/2" Window - Heavy Cardboard.
Ray
2025-08-21 20:32:10
Works great for student Kaleidoscopes
Aunt B
2025-07-08 13:07:22
Used with my students when learning about light and color. I used a hole punch to add them on a lanyard string. This let us use them all day in different settings without losing them.
Victoria Vaver
2025-06-14 21:02:16
I added these to kandi & gave them out at electric forest. Huge hit & easy to carry around a fest for rave gifts :)
Del M.
2025-05-03 18:36:22
I like to keep a few trinkets in my pocket or purse in case nearby kiddos get tantrum-y at grocery stores, on planes, restaurants, etc. (I always get parent permission, of course!) These are SO GREAT for handouts. They're basically cardboard monocles made out of the same stuff as "fireworks glasses" they sell around July 4th. Looking through them turns every light source into dazzling rainbows. Kids adore them and if I'm ever blue, I squint through one and the rainbows really lift my spirits. They're great!
NS
2025-04-01 12:45:17
Very beautiful, fun to play with. I was under the impression there were multiple grates and therefore different patterns in different ones, but that's not the case.
LynnFC
2025-03-16 14:34:03
These are so much fun! Easy to send along with a note to anyone, kids, senior citizens- I mean who doesn’t love an instant rainbow - cheap stocking stuffers and nice to have on hand for fidgety children ( I always ask the parents first or I discreetly hand to a parent)- I carry around a few in my car just to brighten Someone’s day!!!
B14peeper
2025-01-29 14:13:56
They are all the same. I thought each one did different things with the lights but they are all the same.
Joanna
2025-01-23 10:38:28
I gave these out to a first grade class and the kids LOVED them. Some took them home and made kaleidoscopes with them and others just played with them as is - really cute. A bit overpriced, and the first package I received only had half the discs, but Amazon quickly fixed the issue for me, and the kids were really happy with the rainbow makers :)
Diego Reynoso
2024-12-16 14:34:11
En la descripción no se alcalza a ver si tamaño..son como una moneda.
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