Mac discovers refraction

Mac is run­ning from room to room des­per­ate­ly try­ing to catch a rain­bow so he can put it on the birth­day card he is making.

If I can catch one, it would be the coolest thing to give grand­ma for her bithr­day. I won’t stop until I catch a rain­bow …Can you type “How can you catch a rainbow”…No! I meant up there at the top of the screen”