The straight line competes with the squiggly line to become more fun and win the heart of the perfect circle. The straight line eventually learns how to create angles and complex shapes in order to win over the circle.

This video pairs a dance about angles, acute and obtuse, to a catchy beat.

Beakman challenge where he wraps a paper towel around the end of a paper towel tube and then fills the tube halfway with salt. Then pushes a plunger handle into the salt to try to break the tissue but he can't do it. He explains that this is because the push of the handle expels the air that the salt crystals come together to absorb all of the force and none is left for the tissue.

Hazel Fanny the Science Granny demonstrates balanced and unbalanced forces using a game of tug of war. When forces are in balance, they are equal, and no movement occurs. When forces are unbalanced, they are unequal, and movement occurs.

Beakman has Lester try to karate chop a board and it doesn't break. Phoebe comes and does it and breaks the board. They do a slow motion replay and explain the science behind it.