Back in the day, before we discovered the joy of dolls house structural engineering with cardboard boxes, I was desperate to find something new to do with a cardboard box, and a toddler who had been inside for too long.
Out came the sharpies and a knife to make a little house. It’s pretty good for a younger toddler, at this stage mine was obsessed with putting things in things so on several occasions ALL the toys disappeared in this box.
It’s very quick to make. If you are not 100% confident with your drawing skills (and I am not) have a browse online at some basic illustration. It’s sometimes just good to get a bit of inspiration to start you off. Basic sharpie line drawings can also double up as colouring templates for kids so they can help to decorate the house.
And always build a cat flap. It’s amazing how occupied a 2-year-old stays with a cat flap, or a corgi flap in this instance.