- 473 mL (16 oz.) bottle
- Pressurizing pump (Fizz-Keeper®)
- Large plastic test tube
- Activity guide
How Does It Work?
What Does It Teach?
Another "Keeper" review by Kathy Wilmovsky on 5/5/2013
This is a great way to demonstrate air pressure. The class was entranced as the marshmallows shrank as pressure was added and expanded back to normal once the pressure was released. The only issue I had at all was letting my students use the masher. I have several who I would be afraid would pump, and pump and pump until the bottle exploded. Therefore, I ended up just doing this as a teacher demonstration for the class.
cool review by jeff Sowers on 3/25/2013
I love your stuff it is so cool to use in kids church.
Thanks Pastor Jeff