In this video Pumpkin used the Little Professor Science Kit: Polymers to try the “Perform a cool magic trick” experiment. The kits come with everything you need. You just add the water!
I’m sorry to say we actually completed this experiment last year when we were in the midst of living in temporary housing. So, I apologize for the late posting. Pumpkin looks very young to me in this video!
I will say that this ready made kit made continuing our science studies a lot easier. We bought it at our annual homeschool convention but you can also buy direct online.