DIY Water Wall - uses plastic bottles -Great activity for Brownies WoW.Wonders of Water. What an awesome idea!
Or marbles! Teaching Mama: Pool Noodle Water Wall-Fun, summer activity for toddlers. Pinned by SOS Inc. Resources siu ki Inc.
Make a Recycled Water Wall for outdoor summer play and water sensory and science with recycled containers, toys, a pegboard and zip ties.
Gutter water play -- used to do this every summer with my mom& summer camps! Love the connectors and props, that looks really stable. So fun!
Water fun - made with funnels, Pop Toobs, plastic bottles, pool noodles and watering cans. Attached to vinyl coated hardware cloth with Velcro plant ties
Fun Ideas for "Water-Wall or Sand-Wall" diy water wall - happy hooligans
DIY Kids Water Wall by playingbythebook via curbly. this is more about play, but I think something a little more durable with this same idea might go well in the sideyard garden/play area.