I was waiting for my daughter to get home so I made a speedy packing crate.

To be honest it isn’t the most elegant thing ever. But there was no measuring involved. It is made from a tongue depressor and some paper from an exercise book. Once the PVA is dry I will get it painted.
I used a second depressor to mark out the 4 sides.
These were cut out and placed on a piece of masking tape

Planks were etched into the pieces of wood (not shown here)
The tape had a tab left on one end and then folded in on itself so the tape was on the inside.

A bottom was then glued on and trimmed once dried.

The edging was folded in half and glued onto all edges. Cross pieces were cut out and added.
A lid was made and edged as above.