In this Home & Garden video tutorial you will learn how to make a concrete obstacle. Materials required are cement, 1 big receptacle, 1 small plastic receptacle, a cup for measuring, a spatula, 1 mold, WD40, paper towels and protection mask. Wear the mask, spray WD40 on the small receptacle and the mold, and wipe off with paper towel. Pour two cups of cement in the big receptacle, add one cup of water and mix slowly with the spatula. You can add more cement, water and make it to a watery...