What exactly are sculptures? You could think of them as art in 3D (three dimensions). Sculptures can be made by carving, modelling or placing materials together. They can be made out of stone, wood, clay or any other material the artist wants to use!
The artist Lawrence Weiner calls himself a sculptor (someone that makes sculptures), although he mainly make artworks with words on walls. Do you think this is sculpture?
So sculpture can be lots of things. It could even be you!