Through this activity, students will be able to explore the role of mass distribution as cylinders roll down an incline.
Students will roll two cylinders filled with the same mass, but distributed differentlly. Students will predict which one reaches the bottom faster.
Using easily accessible materials, this activity can be conducted in the classroom.

You can space weights along a string so that they make a regular rhythm of beats when they strike the ground.
Through this activity several concepts can be explored: acceleration, gravity, weight, rhythm, sound.

Experiment using pennies,  water. lemon, and salt to create a battery to power an led light
includes a materials list 
a video of the experiment
an explanation of the concept  behind the battery