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Trick your family and friends with this creepy crawler that moves up and down. In this activity, learners construct a circuit and motor device that will move a homemade spider in a spooky way.

In this optics activity, learners conduct an experiment to find out why two eyes are better than one!

In this activity about depth perception, learners create an optical illusion in a shoe box.

In this activity, learners will make a thaumatrope, an old-fashioned optical illusion that dates back to the 1820s.