One of the Buddha's ways to explain the non-self-ness of objects was to have his monks mentally take apart a chariot and ask where "chariot" comes into being, what "chariot" does as opposed to constituent parts like wheels, carriage, etc. Ultimately, even those parts are reduced to the four elements (in traditional science) or, in our science, to the properties of their molecular properties, atoms, and subatomic particles. You can try this too, with a chair. Is the "chair" holding you up right now? Or is it really the various molecular bonds in the wood, metal, or plastic? Is the "chair" white, or black, or another color, or is it the molecular properties of the pigmentation? And do you ever perceive the "chair," or rather, different elements of it, like its size, color, and texture? And so on.