Here are a couple of videos from the “Non-Newtonian silly putty” demonstration. The full videos are linked from the GIF titles.
Watching the silly putty flow through the racquet. The full video is one minute long and is made from 60 photos taken at 2 minute intervals so that the video represents 2 hours of elapsed time.
An index of all the demonstrations posted on this blog can be found here. Don’t forget to follow @nbkaye on twitter for updates to this blog. If you have a demonstration that you use in class that you would like to share on this blog please email me (firstname.lastname@example.org). I also welcome comments (through the comments section or via email) on improving the demonstrations.