homemade modge podge: Fill jar half way up with white glue (like Elmers); Then fill jar up with water. This is a mixture glue/water. It will have a Matte finish. If you would like a Glossy finish, add 1 Tbsp of clear varnish. Shake it!
Easier, cheaper alcohol inks and dyes - use a cheap small spray bottle - mix KoolAid or food color or easter dye or RIT dye with rubbing alcohol. Intensity of color depends on amount of your preferred additive. I tried it and it works.
"This idea is simple but creates a fabulous textural piece of art. The kids will have such fun. They could create smaller pictures for things like cards/invitations and everything up to large art pieces for the bedroom wall!" // looks like fun :)