Museum of Science and Industry in Chicago
The Museum of Science and Industry in Chicago has a great selection of
hands-on activities that teachers can use offline in their classrooms.
There are activities for twelve topics that go from preschool to High School.
You can do a search for an activity by selecting the grade level and then the topic.
Some of the activities even have a step by step guide to making it.
Have a look at building a wind turbine as an example