My group loves to paint with water in the summer. I spotted this idea *somewhere* but I don’t recall where now – it was a preschool that had made these and hung them on the fence. I thought it was a genius idea – attach the paintbrush to the water jug that can be filled & carried – it has one purpose – water painting. Love it. The kids did too, it keeps them busy for a long time. They asked me for a ladder to “paint the roof” on the climber. I don’t think so! Some openings on the jugs are cut better than others – some I made the opening too large. The brushes already have a hole in the handle for attaching to the milk jug with a string – .89 at Home Depot.