I bought three of these plastic storage boxes this morning and am painting them with a textured brownish red spray paint to use as fillers (lid facing down)! Super cheap, super light weight, come in different sizes if you want a taller filler, and you can help anchor them down better by putting something heavy in it before closing the lid and turning it upside (brick? block? whatever you have). You could even drill holes and put fake flowers in the top…I may buy some more later and do that.
Anyone else? My horses are at home and I’m trying to think of new ways to spruce up my jump field. I’m painting the poles, have a tarp for a fake ditch, and have a lattice rolltop type jump, but the more the better!