In these two pictures the students are challenged to lift the marble off of the table without touching it directly.

Here a student discovers that he can lift the marble by spinning it with the cup. If he spins it correctly he can create enough centrifugal force to overcome gravity and lift the marble and cup off of the table.

Here students explore the properties of friction and gravity by designing a children's slide from a cd rom.

Here students crash two "cars" together. They record the 5 different results of a collision.