Meditation stones are groups of stones that are placed together because their size, shape and colors are pleasing in relation to each other. Sometimes the most remarkably interesting things can come from joining together stones that don't have much going for them all alone. I think there is probably a lesson in that.
Standing sculptures do just that. What is interesting to us is that they are only a few inches tall, but if you get close to them, or look at them in a picture, it is possible to see them as sculptures many feet tall.