First I started with a sketch of how I wanted it to look and made a quick drawing of the box sides and sizes.
Mark these sizes onto your wood ready to cut out.
Step 1: Building the box
Step 2: Fitting the top
Step 3: Fitting the tubes
The cover piece at the top was an afterthought and is just a strip of plywood left over and glued into place. It seems to make the finished product look more professional.
This is then placed outdoors near bushes where the ladybirds can over-winter in your garden. The following spring they will emerge and go hunting for bugs, lay eggs and then the ladybird larvae will continue to eat the unwelcome bugs in your garden. These will then change into ladybirds and then find the ladybird house to over-winter in again and the cycle repeats itself.