When I got to thinking about it, I realized that the tool I always use in my art is gel medium. I've already shown what happens to my son when I use it here. Better than glue, I use it to adhere pieces in a collage, as a fixative for pastels or watercolors, as a sealant, or as a thinner. It dilutes paint without making it runny, adds texture, depth and translucence. This stuff is good, people. Yes it gets all over everything. Yes I catch myself pulling off thin sheets of dried gel from my elbows or fingers like peeling skin after a sunburn, but I'm fine with that. I've never been one to keep my hands clean anyway.