Stones.

Depends what you mean by stones. Are they smooth water worn pebbles or chunks of rock that look like brick ends? And how big? You could make attractive paving slabs by setting them in cement (do I mean cement or concrete?), if they are smooth pebbles, make an Andy Galsworthy type sculpture.

..........or scatter them on the ground, send it to the Tate and change your name to Tracy Emin.

..........or scatter them on the ground, send it to the Tate and change your name to Tracy Emin.

I remember being at the Tate and someone asking me to get my son off the exhibit, yes it was a pile of bricks/stones