This is an introduction to matter activity that I do with all levels of general science and chemistry classes that I have taught. There are various "Oobleck" or slime recipes available all around the internet - the one in this activity is close to slightly more fluid than Silly Putty and uses a Borax solution to bind the polymers in Elmer's Glue so that it will stick to itself.
The activity involves no math and is purely qualitative observation-based. I have some pre-lab questions for the students to review basic characteristics & properties of matter (solid, liquid, gas, element, compound, mixture, intensive & extensive properties). Then there are some analysis questions that draw on those characteristics and properties to get the students to reflect on this "Oobleck" that they've spent some time playing with. There are also 2 pages of "extensions" to try to get the students to generalize their observations and connect them to a more varied set of materials.
I include a page of notes on making the solutions based on my experience setting this up for students. This should make your first time through go more smoothly.