49 Brilliant Garage Organization Tips, Ideas and DIY Projects - Page 31 of 49 - DIY Crafts. This looks like Bouillon Cube jar lids screwed to the board, so jar part can screw onto the lid. I've also seen done with baby food jars.
(link) FOUNTAIN: How to Build a Concrete Fountain ~ Create a stone-lined garden pond, then carve a waterfall out of a block of stone using basic power and hand tools. The technique is simple, even for beginners. This is a STEP BY STEP TUTORIAL GUIDE
Use an old tire to create a small backyard pond. My kids, 3 sons, have been helping with yard work and planting. They keep asking for a pond. I think this is a great DIY project to do outside with them. Looks simple.