Cedar Fence Picket Sandbox

Lay two 2x4 spines down on a flat, level surface. Attach two cedar fence pickets to the top with 1-1/4" screws. Build two of these identical assemblies.

Attach two cedar pickets to each side of the two spine assemblies, connecting them into the overall sandbox shape.

Find the center of the side pickets you just attached and screw the center 2x4 spine in place, with the narrower face oriented toward the sides — the same orientation as the two corner spines. This is what keeps a sandbox this size from flexing underfoot.

Place the remaining top pickets along all three spines and attach.

Screw the remaining pickets to the open ends, flat against the sides. Sand every top edge thoroughly to prevent splinters — this surface gets bare hands and feet all summer. Finish with an exterior product if desired.