Simple tools like hammers, saws, screwdrivers, levels, drills are required with material such as wood for siding, shingles for the roof and doors and windows. Level the ground (if necessary) and install deck piers along a grid to support the shed. If you want a 4” or 6” thick concrete pad, then the tamped gravel needs to level out 4” or 6”s below the top of the forms.