Nice job with the fort, that’s a good start. If you want a proper crib, keep it simple and solid. Use sturdy 2x4s for the frame, nailed or screwed together with a 2‑inch screw at each corner. Make the base about 1 inch thick plywood, glued to the frame for extra support. The mattress should fit the 30‑inch width and 50‑inch length of a standard crib; add a thin plywood backing to stop it from sagging. Add a simple slatted or perforated side panel so air can circulate and no baby can get stuck. Finish the wood with a child‑safe, non‑toxic paint or clear coat. Keep the overall height at about 26 inches so the baby can crawl in and out easily. That’s a crib that’s sturdy, safe, and built to last.

Sounds good. Keep the screws in a small toolbox—just a few is enough. Add the blanket, and a little drawer if you’re handy. Build it steady, and you’ll have a crib that’s solid, safe, and cozy. Good luck, and be careful with that hidden drawer—it’s a good idea to keep it out of reach once the baby’s older.