Take out the blocks and see how tall you can build a skyscraper.
Or try this…
Make your own large size blocks:
- Wash the inside of half-gallon size cardboard milk or juice containers
- Carefully cut off the folding top portion of each container
- Put one container completely inside the other with the two closed ends facing out. These are strong enough to stand on!
Photo by: Ella Novak (Flickr)