well I've done one and this is what I had done....
it is a upside down umbrella and there's a faucet one the bottom and there is water coming out of the faucet and dripping on a little plant, and the umbrella is half way filled with water, and i wrote "rainwater use for life" and the letters of rainwater and life are blue and the rest are black, or you can do
draw a earth and draw a faucet coming out of the side of the earth and one big water drop dropping out of the faucet coming out and two hands holding out with the wrists touching each other, and underneath the water droplet, and write around the drawing, "save every drop, the world depends on it!!!"
try this, hope it works let me know if it does!!!
