Outdoor shower/water day for kids.Could easily be made with hollow box uprights, run the water tube through one and the top hollow box with a PVC tube that you drill holes in for the water to run out. Faux paint it to look like copper, really pretty easy.
Raised beds, collecting rainwater as well. - perhaps tiered beds can have a French drain at the end that catches excess water run off from the rain. It would be a larger area to collect rain water and would only be extra If the other plants were all