More work on the membrane box

Box sides--veneer glued to an MDF coreI've had two weeks of various experiments trying to figure out the best way to configure the lid and membrane on my current project. At this point I'm getting tired of mucking around with it and I'm going to build the box and figure out the top later.

So next week I'll be focused on getting the box together. I've already glued up the veneer and core for the sides of the box and now need to figure out the bottom and the frame for the membrane on top.

One idea I've had is to just stretch the membrane in a frame and then build some sort of kinetic element that sits in a top tray. Maybe if could be triggered by sound or proximity to create movement under the membrane as someone approaches the box??? If anyone has any thoughts or ideas, please post a comment--I'd love to hear from you!

Grid used in a failed kinetic experiment for the boxThis grid was used in one of the mock-ups that I didn't like. I like the grid, but the movement element for the box just didn't work out.