To make fake water for your craft project, you should start with a thick piece of foam board. Cut ripples into the foam board to replicate the movement of water. Then, spray paint your foam blue and allow it to dry. Pour acrylic gel into a pan and mold it into the shapes you want to achieve the effect of fake moving water. Use blue plastic wrap for fake water. Finally, ask your local craft store if they have any fake water products to add your work.