My wife subscribed to these kids Tinker Crate kits for my daughter for either her birthday or Christmas last year. They send you one every month and each contains a project and sometimes a smaller side project with a Zine and all the parts. Each one is science and engineering based and directed at ages 9 and up. My daughter is 7, but she loves them. In this video, we'll build the Color Mixing RGB LED Crystal. Pretty cool if you have kids and want to introduce them to basic engineering concepts. Some of the past ones included an articulated hand and a cam-driven elevator. We try to show all the instructions in this video, so if you're missing your instruction sheet with this crate, this video may help you.
Here's a link if you want to check them out: https://www.kiwico.com/Refer?i=KatherineL71