It is a fun time to be a kid if you can take stuff apart and make new things with it. This is all about Do It Yourself at a child’s level. Things they can make can be toys, actually useful tools, and so much more. The idea is to recycle a lot of different things (even go out and pick up trash in parks) and turn the trash into fun gadgets.
All of these projects are STEM involved and all will probably need at least a little adult supervision for the older kids to a lot of supervision for the younger ones. The lessons are detailed.