Butterfly wings are made up of thin layers of proteins called chitin.

They are supported by a system of tubular veins that allow for oxygen exchange.

The wings are then covered by an intricate system of scales that give butterflies their unique color and pattern variations.

To learn both about butterfly wings (and to incorporate our math domain) your little ones placed “scales” onto three different butterfly cut-outs.

The scales were represented by glass jewels and numbers we counted were ten, eleven (our number of the week), and twelve.