Dig a flat footing for your pedestal at least 1 inch into the soil. Since no mortar will be used in the construction, a level base is extremely important to prevent sliding and uneven weight distribution. Use a level to make sure the footing is straight, and pack down any loose earth with a hand tamp. For best stability, use 10-inch square pavers or larger.
Place the first paving stone on the footing and backfill all around it with the dug-up soil. Pack the dirt in firmly and double-check that the paver is still level. Tamp down with a rubber mallet if necessary.
Stack the next pavers one at a time, making sure that each paver rests evenly on top of the paver below. Check both the horizontal and vertical levels every few stones to make sure the pedestal is not leaning in any direction.
Cap the finished pedestal at the desired height with a slightly larger paving stone. For mortarless construction, it is advisable to stay under 4 feet high for best stability.