|a window-based cold frame|
But I didn't need power tools.
I used nails and twine to secure the sides (so I can take it apart to store), and the top lies securely on the sides.
If I can find two taller end pieces (or the right-sized windows), it would look much nicer, but it seems functional.
|windows and a electric screwdriver (not needed)|
|another low tech bamboo hoop house with plastic|
I sowed some spinach and arugula seeds, and transplanted some lettuce. We'll see.
I'm hoping that my second box (in a bed in the mountains) will look nicer, but that depends on matching the windows with the ends!