I received a Kikkerland Solar Radiometer for review, and here is what I thought of the product:
My Review
This is a lovely little techy gift! It appeals to my imaginative side, where I see it as a steampunk-inspired novelty item that is rooted in early scientific developments. It is fascinating to sit and watch the little spinning vanes, and I think this would be a perfect gift for people who love science, steampunk, and magical realism.
About the Product
Solar radiometer by Kikkerland – measures radiant flux of electromagnetic radiation. Crookes radiometer – a curiously retro scientific instrument for measuring light. A sealed glass case with 4 vanes that magically spin when a light source is present. Kit out your office in Dumbledore or steampunk style. Hand blown glass replica scientific instrument.
Buy Kikkerland Solar Radiometer here.
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SpookyMrsGreen 
I had no idea what a Solar Radiometer was until your review – it sounds cool! I had a look on Amazon and there’s a promo video there that shows it moving. Definitely a novel gifting idea. xx
Yes it was fascinating, had me staring at it for a while! My girls loved it too.