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This is a plywood box dressed up to look like a heirloom trunk. The trick that makes it work is the base: instead of setting the box flat on the floor, it rides on a small platform built up on 2x2 runners. That lifts the bottom off the ground — so a spill doesn't sit against the plywood and rot it out — and it puts the trunk's weight bearing down on top of the base joints, which makes the whole thing stronger the more you load it.
The box itself is nothing but 3/4" plywood panels glued and nailed into a rectangle. What sells the look is trim: base moulding mitered around the bottom hides the plywood-to-base seam, and a run of 1x6 boards across the top covers the raw plywood edges and gives the lid a planked, furniture-grade face.
If kids will use it, add a lid-support hinge. A heavy plywood lid dropping on small fingers is the one real hazard here, and a $10 soft-close stay removes it entirely.
| Item | Qty |
|---|---|
| Plywood, 3/4", half sheetRipped into 15-3/4"-wide strips for the box. | 1 each |
| Plywood/hardboard, 1/4", half sheetBottom panel and any inset panels. | 1 each |
| 2x2, 8 ftBase runners. Furring strips are fine. | 1 each |
| Base moulding, 3-1/4"Wraps the base — miter the corners. | 20 foot |
| 1x6 board, 10 ft totalPlanked top boards. | 10 foot |
| Wood glue | 4 oz |
| Brad nails, 1-1/4" and 2"Size to your moulding thickness plus the 3/4" plywood. | 80 each |
| Wood screws, 1-1/4" | 20 each |
| Exterior-mount hinges | 2 each |
| Lid-support stayOptional but strongly recommended for a kid's toy box. | 1 each |
Overall cost: $$. Lumber prices vary by region, species, and season, so we give a band rather than a figure we would only be pretending to know.
| Part | Qty | T × W × L |
|---|---|---|
| Bottom panel1/4" plywood | 1 | 1/4" × 20 1/4" × 36" |
| Base runners2x2 | 3 | 1 1/2" × 1 1/2" × 20 1/4" |
| Box ends3/4" plywood | 2 | 3/4" × 15 3/4" × 18 3/4" |
| Box front/back3/4" plywood | 2 | 3/4" × 15 3/4" × 36" |
| Base moulding, long sidesBase mouldingBoth ends mitered 45°, short point to short point. | 4 | 1/2" × 3 1/4" × 36" |
| Base moulding, short sidesBase mouldingBoth ends mitered 45°, short point to short point. | 4 | 1/2" × 3 1/4" × 20 1/4" |
| Top boards, cross1x6 | 3 | 3/4" × 5 1/2" × 10 1/4" |
| Top boards, long1x6 | 2 | 3/4" × 5 1/2" × 37" |
| Lid corner blocks3/4" plywood | 2 | 3/4" × 10 1/4" × 10 1/4" |
Buy 10 boards at 8 ft.
1 board
2 boards
1 board
2 boards
3 boards
1 board
Assumes 8 ft stock, a 1/8" saw kerf, and buying each part at its own width. Change the board size or kerf on the full board plan →
Nail and glue the 2x2 runners under the 1/4" bottom panel. The point of the runners is twofold: they raise the trunk off the floor so a spill can't wick into the plywood bottom, and they put the trunk's load directly over the joints, which tightens the whole base under weight instead of loosening it. Nothing fussy here — glue and brads hold it fine.
Glue and screw the four 3/4" plywood panels into a rectangle — ends inside the front and back, or however your cut list is laid out. Keep it square as you fasten; a box that racks now will fight the lid later.
Attach the box down onto the base, glue and screw (or nail) from inside. Don't worry that the fasteners are light — the weight of a loaded trunk presses the box onto the base and keeps it seated. The seam between the two gets buried under moulding in the next step anyway.
Set your miter saw to a 45° bevel and cut the base moulding to wrap the bottom. Cut each piece a hair long and creep up on the fit — trimming a whisker off a too-long miter gives a tight corner; a gap on a too-short one is permanent. Glue and brad it on, choosing a nail length that reaches through the moulding and bites the 3/4" plywood behind it. Wider moulding works too if you want a beefier base.
Build the lid from the 1x6 boards laid across, then edge boards to finish it off. The planked layout adds character and, more usefully, caps every raw plywood edge on the lid so no end grain shows.
Mount the lid with exterior-style trunk hinges. If a child will use this trunk, add a lid-support stay so the heavy lid can't slam shut on fingers — it's the only genuinely dangerous part of the build and the cheapest to solve.
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