It's true, sometimes children prefer to play with the wrapping instead of the toy.
Here is a great example of what you can do with some of the old boxes you have laying around.
Here I have used black cardboard boxes but regular brown boxes are good to use too.
Provide your little one with crayons, metallic pens, paints and chalk and let them be as creative as they desire. Without providing too many rules for this activity, you might like to have them practise writing their name, mathematical problems or just draw a picture that inspires them.
I hope you all have fun with this activity.