You've completed the Exploration & Activity!
This video will show you that ramps, rolling balls, and falling sticks can do some amazing tricks. Here are things to watch for and talk about.
Does this video give you ideas for your own chain reaction?
Here are some images and short videos to get you thinking.
What ideas do you have for using everyday objects in your chain reaction?
Newsela offers readings about engineering design. Here are three great readings, free with registration.