What's inside
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This shallow sorting tray gives acorns and pinecones separate places to land without rolling off a table. It works as a fall nature-table project, a classroom activity, or a simple shop build. The plan uses a plywood base and solid-wood dividers; the compartments can be changed to suit the material you collect.
Contents
Plan and dimensions
The finished tray measures about 16 inches long, 10 inches wide, and 1½ inches high. It has three compartments: one 6½-by-8-inch bay for larger pinecones and two narrower bays for acorns and small finds. These are inside dimensions; actual space varies slightly with the thickness of your stock.
The open top makes sorting easy, but this is not a storage box with a lid. For small children, keep the tray stable and supervise use: acorns and small natural objects can be choking hazards. Check every cone and nut for insects, mold, sharp stems, or loose scales before bringing them indoors.
| Choice | What it suits | Trade-off |
|---|---|---|
| ¼-inch plywood base | A light tray kept indoors | Affordable and easy to cut, but can flex if unsupported |
| ½-inch plywood base | Frequent handling or a heavier collection | Stiffer, but heavier and usually costs more |
| Solid-wood base | A matching, furniture-like build | Looks good, but seasonal movement and glue-up add complexity |
For most first-time builders, ¼-inch plywood is enough if the tray sits on a flat table. If you want a tougher base, choose ½-inch plywood and adjust the bottom groove or glue surface to match.
Materials and tools
Gather a 16-by-10-inch plywood blank, two 16-inch side rails, two 9-inch end rails, and two divider strips around 8 inches long. Use ¾-inch-thick pine or poplar for the rails and dividers. The end-rail length assumes the rails fit between the long side rails; check your actual stock before cutting. You will also need wood glue, sandpaper in 120- and 180-grit, and a finish if desired.
A handsaw and sanding block are sufficient for a one-off tray. A miter saw makes square rail cuts faster, while a table saw or track saw helps rip narrow, consistent pieces. If you lack a saw, ask a lumberyard to cut sheet material to size, then check each edge for square before assembly. A combination square is useful for marking and checking corners; an inexpensive one is fine if its blade and stock meet at a true 90 degrees.
For a neat, repeatable edge, a small hand plane can trim high spots, but careful sanding works for a decorative tray. Do not buy a plane just for this project.
Cut and fit the parts
Cut the base to 16 by 10 inches. Cut the two long rails to 16 inches and the two end rails to 9 inches, assuming the end rails will sit between the long rails. Dry-fit the frame around the base. The outside dimensions should be close to 16 by 10 inches; if your rail thickness or joinery changes that, trim the end rails to fit rather than forcing the corners together.
Mark the divider positions on the base. One practical layout puts the first divider 6½ inches from an inside end, then places the second divider 4½ inches farther along, leaving the remaining bay for smaller items. Measure between the inside faces of the end rails, not from the outside edge. Cut the dividers to fit snugly between the long rails. A slightly loose fit is easier to glue than a divider that bows the frame.
Assemble the tray
Sand the base and the inside faces of the rails while they are easy to reach. Apply a thin, even bead of glue along the bottom edge of each rail and position the frame around the plywood. Clamp the sides or use painter’s tape to hold the corners while the glue sets. Check both diagonals: if they are equal, the frame is square. Wipe away squeeze-out with a damp cloth before it hardens.
Once the frame is stable, glue the dividers to the base and long rails. Keep them upright with a square and use light clamps; too much pressure can bow a thin divider. If you prefer mechanical fastening, use small brads, but predrill near rail ends if using screws. Screws driven into narrow stock without pilot holes can split it.
Let the glue cure according to its label before lifting the tray by one corner. If a corner opens, the usual causes are a cut that is not square, too little clamping, or glue applied to a dusty surface. Re-glue the joint rather than covering the gap with finish.
Sand and finish
Ease sharp edges with 120-grit paper, then smooth exposed surfaces with 180-grit. Avoid rounding the top edges heavily: a broad bevel can make dividers look uneven. Remove dust before finishing. For indoor display, leave the tray unfinished or use a water-based clear finish. If children will handle it, choose a finish labeled for the intended use and let it cure fully; “dry to the touch” does not necessarily mean fully cured.
Do not use a finish on objects that will contact food. This tray is for natural collections, not serving snacks. If it may get damp, dry the contents separately and wipe the tray promptly. Standing moisture can raise the plywood veneer or loosen glue joints.
Test and adjust
Set the tray on a flat surface and press gently on each corner. Rocking usually means the base or frame is out of square, or one rail is slightly high. Sand a high spot cautiously; removing too much material can leave the tray uneven. Try the largest pinecone and acorns you expect to sort before adding a finish. If a cone catches on a divider, round its top edge slightly or widen that bay by moving the divider.
Store the tray dry and empty. Natural materials can bring in moisture and insects, so inspect and clean them before sorting. A quick build with simple stock is usually enough; spend extra only where stiffness, repeated handling, or a cleaner finish matters.