You will need:

A cardboard box (any size or shape)
Scotch tape
Scissors
Magic pens
Lots of imagination!

Talk with your child about what you could make with a cardboard box. Let him / her come up with lots of ideas! Then set to work, involving your child in lots of conversation and activity as you go.

As with all activities with young children, do make sure this activity is closely supervised by an adult at all times.