Building Clara a sandbox turned into a project that took nearly a year to finish. If you need proof, check the post about her first birthday party from last May — our girl is almost two now. We kept putting it off because we couldn’t decide where to put it. At one point we considered a wheeled sandbox that could be rolled onto the patio when in use and stored otherwise, but with so much yard, a permanent spot made more sense. In the end we avoided committing to a location and Project Sandbox sat on the back burner for eleven months. (The bagged play sand we bought did come in handy for sandbagging the basement when Hurricane Irene hit last August, but mostly it just sat in the yard — a guilty reminder of a broken promise.)
Recent outdoor improvements gave us the push to finally finish it. While tidying up the patio we discovered the perfect spot: a now-open area that had been hidden behind a removed rhododendron. It’s partially shaded by a dogwood tree, close to the patio, and inside our small fenced side yard. We realized we could add stepping stones to guide Clara from the patio and that this was the best place for the sandbox. Once we decided, we got to work.
What looked like a tight corner is actually a level 7 x 7 foot area — large enough for a functional sandbox. I turned to Pinterest for ideas and found many smart and simple designs. I wanted something uncomplicated and sturdy. The first task was clearing the area of liriope, which wasn’t too thick and went quickly.
We settled on a roughly 5 x 5 foot sandbox — roomy enough for Clara and a friend without being oversized. I measured out the area and used orange flags left by the previous owner to mark the corners. Then I dug a 6-inch-deep hole so the box would be slightly sunk into the ground. That keeps it stable and allows a generous depth for digging while keeping the sides low enough for Clara to climb in and out easily.
The bottoms of the boards sit on a mostly level base; I made sure the four sides were even so the framing lumber would sit square. We used 2 x 10 framing lumber — the same type used for an earlier indoor project — and avoided pressure-treated wood because of the chemicals commonly used in treatment that aren’t ideal for regular child contact. Instead we used regular framing lumber and sealed it for outdoor use.
I bought two 10-foot boards and had them cut into 5-foot lengths at the store. The 2 x 10s are wide and sturdy — wide enough to sit on if needed. We opted not to add built-in seats or overhangs because they tend to collect spiders and webs over time, and in our experience we usually just sit inside the box anyway.
To protect the wood we applied a waterproof deck stain. We used a neutral “Natural” stain to let the wood age gracefully and coordinate with the fence and other outdoor elements. We debated painting patterns or colors but decided they’d likely fade and show dirt quickly; a natural stain would be low-maintenance and blend in well.
After two coats of stain and overnight drying, the sides were ready. I cut some scrap lumber into short corner posts to secure the boards at each corner. Before installing the boards, I laid down weed-block fabric to prevent weed growth and to separate the sand from the soil, while still allowing water and air to pass through so the sand wouldn’t become damp and musty.
I had leftover weed block fabric, so I laid two layers in opposing directions for extra protection and secured it with garden staples. For construction I followed a simple in-place assembly: I dug short stakes into the ground at each corner, packed dirt around them, and used the stakes as anchor points for the boards. The stakes only went about 4–5 inches deep, so most of the stability came from the boards themselves, but the stakes made it easy to attach the sides.
I checked each corner with a square to ensure 90-degree angles, then screwed the boards into the stakes using 2.5-inch exterior decking screws, one from the outside and one from the inside. The process involved a lot of leveling and checking, but gradually the sandbox took shape.
With the box assembled, I backfilled around the sides so there wasn’t a moat and to help hold the boards in place. You can see the weed-block peeking out beneath the boards — that helps keep everything neat and functional.
The final essential element was a cover to keep neighborhood cats and birds out. We wanted a hinged cover that could be secured so Clara wouldn’t accidentally trap herself. We designed a cover with safety and function in mind and documented that process separately. The cover adds an important layer of protection and makes the sandbox practical for everyday use.
We admit we made parts of the project more complicated than necessary, but we’re very happy with the result. The sandbox feels solid, looks natural in the garden, and already promises hours of outdoor fun for Clara. Here’s a sneak peek of her enjoying it — more photos and details about the hinged cover are in the continuation of this project.
PS: If you need a quick indoor alternative, try an easy DIY moon sand for rainy days or small spaces. It’s a fun sensory activity that mimics the feel of sand without the outdoor setup.