light star-shaped blanket

As I was making my first star-shaped blanket for my moms birthday I was astonished by how much yarn it absorbs ... it took me loads of yarn and time to finish it.. and it is still smaller than I imagined it would be, but as I ran out of time it will have to do and instead of full size blanket this one will be just a leg wormer during winter TV watching evenings... 
I was quite disappointed and then it hit me! I should have made it lighter, and it would have been bigger! so I started a new star-shaped blanket to test my theory of the holes...