This is how I gradually built up a large collection of Marble Genius parts (and other compatible sets). When I saw this for only $10 I bought 3. The attached video only shows ONE of the products used so you know how much a typical purchase costs and I just put together a very basic tower. relatively quiet.+ Runs 95% of the time.+ Lets balls rotate continuously+ Chain length adjustable! (and it has 3 more links than it takes to reach the top. (There are 3 links in the video that I missed otherwise there would be too much slack.) + price! $10 for a motorized elevator after Buy Now Bad: - Not enough small ball traps - As there is a tension that pulls the top slightly off the plane/flat, this can result in the balls not rolling out the top and if another ball falls it will get stuck and the entire chain stops I wish the top had a steeper incline so these marbles move sideways and don't get stuck if the top isn't perfectly flat it's very picky about marble sizes that work if you use official marbles Awesome marbles it will be ok but I have a few other marbles from different sources and if they are a bit bigger or smaller they will get stuck at the top or fall out at the bottom n another balloon and when one rises the other falls out of the machine. So my title says buy 3 and the reason is so you can make a long chain 6ft high if you want. Haven't tried it yet, so I'm not sure if the motor will be powerful enough to move that much chain. But for $10 you can definitely do 2-3 sets and do 1-2 higher lifts. Also, having all those extra little marble "seats" is very valuable. As mentioned above, they are absent. I could assemble all the little seats from all three elevators and put them in an elevator's chain to make it dispense more and more balls. When the product arrives, the chain consists of a series of individual segments that you simply connect. I placed the "seats" to attach to each segment and was a little surprised when the number of seats didn't match the number of segments. As you can see in the video the locations are still quite far apart and then there is a fairly large section (almost half the way) where they aren't! You must at least double the number of these little places! I've since rearranged them but thought it might help to give an idea of how few these little places are. The motor can definitely handle a lot of seats and balls going up the lift (since I put all 3 lift seats on the same chain - not shown in the video). In case you're wondering, the glowing part that makes the sound is sold. here: https://www.amazon.com/gp/product/B07FXWD6FX/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
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