GRAVEL (or) SAND (Shepaprton 3630)

I asking on behalf of an older lady who is unstable on her feetan is fearful of tripping on the open space. Its to fill a hole in concreted area, it was meant to be a garden space. Its a very small back yard so getting rid of it would make more space for her to use. The area is roughly about 1300cm by 500mm. Dose anyone have eitheer Gravel or sand left over that would fill the space please. I lives in Shepparton but do come to Melbourne a bit so could collect. Thanks Fiona