University of Washington’s Center for Philosophy for Children
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Title and Author: Little Blue and Little Yellow by Leo Lionni

Field of Philosophy: Metaphysics; Epistemology

Plot Summary: Two friends, both blobs of color, love playing together, and one day hug each other so much that they both become green. Their parents declare that they are no longer who they were.

Some discussion questions:

What it is that makes us who we are?
Once little blue and little yellow are green, are they no longer blue and yellow?
Can something change and still remain the same?
If you change, are you still the same person?
Is the way things appear to us a good basis for believing something?
Do we know things because we’ve seen them?
When is appearance a reasonable basis for believing or knowing something?