Visual illusions are fun. They boggle the mind and tickle our fancies.
They can delight us and often surprise us.
But they ask a serious question. Do we see the world as it is?
This question is important because we so implicitly trust our senses
to guide us around and help us interact with the world.
In this activity you will try your hand at several visual illusions
and learn what they tell us about how we experience the world.