03.Doors and windows
Door guards and latches
There are lots of latches and doorstoppers available. The simplest type is a C-shaped foam piece (which you could easily make yourself) that grabs onto the door edge and prevents it closing fully, to prevent slamming on little fingers. These can be especially useful on sliding doors. In other cases it may be just as simple to use a heavy stopper. However, many children like to demonstrate their new-found mobility and motor skills by opening and closing doors, so a latch installed out of reach can be useful to prevent any accidents with pinched fingers (or worse).
Door handle covers
These make handles hard to operate for children but unfortunately can have the same effect for adults. Some are also fiddly to install.
Window latches and locks
A normal security lock is your best bet, with multiple locking positions so you can have the window a little ajar to let in a breeze.