This was my second set of invention cubes and while I was able to build something this time I was again missing parts. This time they were pieces that didn't show up in the final product, so I was able to replace them with other stones. Some stones were easy to connect while others felt like I needed super strength. Some parts of the build didn't hold together well until halfway through the build. The online instructions were easy to follow, but the colors can make it difficult to tell which ones to actually use. You can only build one item and then you're done. There are random stones left that you can't do anything with. They should be designed so that you can do at least a few things at once. In general, I gave this option two chances, but I will not give her a third. It's just not worth the money.
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