String Slime

I have another tip I like to do at Science Camp—-compare diy or home recipes with commercial products.  For example make sidewalk chalk and compare the properties with a pack of chalk from the store.  Do the same thing with String Slime.  Make slime with Sodium alginate and calcium chloride.  Calcium lactate and calcium acetate work, too.  Color the sodium alginate solution before you squirt it into the calcium chloride.  Use tempera paint.  Compare with the commercial string slime.  This is another great lab for science camp or Co-op science class on polymers.