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. Activities for every grade level from pre-K through high school and beyond can be found on the website. To find an activity for your classroom select your grade level then select the topic(s) you want your students to learn about through hands-on activities.

Applications for Education
A couple of the activities that I liked when I was browsing the catalog were making and flying helicopters and making recycled paper. All of the activities on the site include the standards addressed, the materials needed, and directions for carrying out the activity for the first time.