The Black Box project is a series of gift boxes I have made for birthdays and Christmas. It started with several small presents in one decorated box. Over time I added lights, sounds and things that moved when the lid opened. I have been better at making the boxes than documenting them, so this is a collection of the parts I can still show and explain.

The first box was a moving box painted black and wrapped with gold paper. I numbered the flaps using red paper hearts and put matching numbers on the presents. That gave the recipient an order to follow. It also let me choose which present they would find last, without needing a complicated mechanism.

2020: lights in the box

For my girlfriend’s twentieth birthday, I added lighting. This version needed a nearby power outlet, so where I could put the box depended on where I could plug it in. That was manageable at home, but it became a detail I wanted to change for later boxes.

I also moved from spray paint to black acrylic paint because I disliked the fumes from spraying. The box was still an ordinary cardboard construction. The decoration and the order of opening did most of the work; the lights added something to discover.

2022: making it personal

For Christmas 2022, I reused the lighting setup and arranged the lights to spell the recipient’s name. The power arrangement stayed the same. This was an iteration on a familiar box, with the time going into the presentation and placement of the lights.

2023: the lid switches the lights on

My daughter was born in September 2023, and I documented very little of the boxes that year. There is a video where they are briefly visible in the top-right corner. The useful mechanical change was moving to a battery-powered light chain.

I placed a piece of plastic at a battery contact to keep the circuit open and tied it to the lid. Opening the lid pulled the plastic away, allowing the contact to close and the lights to turn on. It was a simple way to connect the opening action to the effect without programming anything.

For another version, I would pay attention to the length and routing of that string. It needs enough travel to remove the tab completely, while staying out of the presents and the recipient’s hands. I would also make the tab easy to put back during testing. Otherwise every test means fiddling with the battery holder again.

2024: eleven boxes

In 2024 I made eleven boxes for the extended family. We would be gathering at a cabin, so the boxes had to be compact enough to move and able to work where they were placed. Making several also meant that a fiddly detail would have to be repeated eleven times.

The boxes included sound modules with a recorded greeting from our daughter. I also experimented with eight autonomous helicopter toys per box, using string activation and custom mounts. Modified aluminium cans were part of the mounting experiment. Some of the triggering was flaky during testing, and the behaviour was less predictable than the lights.

I would simplify that moving section before repeating the design. A future version needs to keep loose parts contained and make the effects easy to test separately. The greeting and lights already provide a clear opening moment. Moving toys add more things that can snag, shift during transport or need resetting.

What I would carry into the next box

For a batch of boxes, I would write a small assembly note with the battery type, how to reset the trigger and a photograph of the finished internal arrangement. That would also leave me with better documentation for the next year. So much of the work here is remembering how I made the previous one behave.

The part I keep returning to is the sequence of opening: a numbered flap, a light coming on, a familiar voice. I enjoy finding a small mechanism that makes that moment work. The next box can build on the parts that behaved reliably and give me one new thing to try.