Yes, I use liquid tempera and find it easier to mix the glue and paint to an
even consistency if I remove the glue first to another container and mix the
paint in with a spoon and then pour back into the bottles. (I know it sounds
like a lot of work but it's worth the extra time.) I have done it w/
watercolor and pastel and I like the effects of the watercolor when the
students blend the vibrant colors. Some students sprinkle salt onto their
paper to achieve that crystalline-look. Try both and see how you like them.
I have done those tissue paper collages using "magic milk" (water-n-glue). Is
that what you were talking about? Brush "milk" on paper and stick tissue on
top and wipe another coat of the "magic milk." Kids love them. I do a paint
mixing lesson using these as a base. Good luck!
Carolyn in MA