Kikkerland Solar Powered Rainbow Maker – Prism Suncatcher, Fun Home Window Decor – Unique Gift for Christmas & Birthdays – Single Crystal

The Device is smaller than what I anticipated, however, what it lacks in size it makes up for in enjoyable features, Visible moving parts, and an array of rainbows throughout the room.As the instructions indicate, it does require direct sunlight, but will perform nicely when placed accordingly.God bless

This Kikkerland Solar Powered Rainbow Maker is absolutely delightful! It's a simple yet captivating addition to any window. The crystal prism beautifully refracts sunlight, casting rainbows throughout your room. The unique design adds a whimsical touch to any space. It's sure to spark curiosity and bring joy to both children and adults. The prism is well-made and durable My wife enjoys this everyday. The only con is that having random flashes of light can be unsettling. It took us about two days to get used to this. Old Eyes.

Creates a lovely little light show! My only complaint is that if you place it in a windowsill, you need to put on a little box or something because the photo sensor will be blocked by the window frame.

Kirklands seems to have a monopoly on this beautiful little mechanical crystal. I have had mine for several years and it is just starting to come to the end of its usefulness now. The mechanics on the inside have stopped working pretty much that being said I bought one for my niece for Christmas and of course she loves it. What’s not to love? It’s really pretty what it is the price point could be a little bit lower. That said, I will continue buying them in the future because they’re so beautiful.

I wasn't sure about getting this solar-powered rainbow crystal in case it didn't work for long. But it has been a presence on my south-facing window for a couple of years now. Light from the sun is turned into electricity that powers a motor and turns the suspended crystal at a revolution of once per 10 seconds. The many tiny rainbow-colored blobs of refracted sunlight that come out of the crystal are flung all the way across my 16-foot kitchen.It is true you need direct, strong sunlight to make rainbows, so it doesn't work on cloudy days.The only problem I had was that the suction cup gave out one day and it crashed to the floor. I hung it on a chain from the top of the window casing to prevent further accidents. The crystal has a chip out of the side, but it still refracts light as it did before the fall. When it's working it makes a ticking sound, which I don't mind, but I know some people avoid things that tick..Only one of my cats has ever been interested in the spot of colored light passing on the floor next to him. And he got used to it quickly, so not much entertainment on that front.But I enjoy the moving rainbows, and it has been one of my favorite purchases.

Very cool, works as described, arrived safely and quickly.

This joins the radiometer and 4" prism as one of the basic sun toys that everyone should have. It's a fun design with a transparent case, exposed motor, different colored gears, and counter rotating crystals. It looks to be quite well made, and I was pleased to find that its large built-in suction cup does a good job. Up close you hear a little whirring sound (not objectionable) from the motor and high speed gear, but from across the room it runs silently. Its speed doesn't vary with the intensity of the light, it either runs or it doesn't run. Occasionally it will click for a few seconds as the shadow of the sun passes over it.I saw one reviewer who said the single crystal unit worked fine, but the double unit was underpowered and would barely rotate in bright sunlight. I don't find that to be the case at all, mine rotates even when the sun is partial obscured by clouds. As I write, it is late on a winter afternoon in New England with the sun low in the sky at 60 degrees off perpendicular, and my double unit is still running. I experimented and found it would even run when the solar cells were illuminated from the back!Minor negatives --- Compared to the one big bright solar spectrum a 4" prism will throw on the wall, the spectrums from this thing are pretty small and dim, though the compensation is that there are many of them and they sweep around the room. When the sun is at the right angle, you have to expect that some of these 'rainbows' are going to pass over your eye, so you get a little flash now and then. It's more complicated than a prism or radiometer, so it's probably not going to live as long.For those interested technically its solar panel is 4 cm x 2.5 cm = 10^-3 m^2 and looks to be five (1/2 V) cells in series. Since the power of bright sunlight is 1,000 w/m^2, if inexpensive solar cells with efficiency in the 5% to 10% range are used, the output power available to drive the DC motor would be 50 to 100 mw, or 20 to 40 ma @ 2.5V.update --- It's now nine months since I put this on a window using the vacuum sucker and it's never fallen off! Still works fine too.update2 --- Well after two years, it's showing its age. One crystal broke off when it fell and the gears are now sticking. I just ordered a replacement.More technical--- When my new one arrived, I took apart my old one to look at the motor, which still works. (I am a motor control engineer.) The motor is not a DC motor with brushes, which is good as brushes wear out. It is a brushless AC PM (permanent magnet) motor that a finger test shows will spin in either direction (at roughly 200 RPM). The 2.5V from the solar cell is converted to AC by a tiny circuit board mounted above the coil. The board's active component(s) is covered by glop, but it is probably a single IC clocked by an external crystal, which seems like overkill.

It was a gift. The birthday girl was delighted.