Children collect various materials from the natural and man-made environment. Materials can include coins, leaves, paper, wood or any material they find interesting. When the materials have been collected, ask children to predict if they will sink or float when placed into water and record their assumptions.
The items children think will float, should be placed on one side if a table while the items they think will sink, should be placed on the opposite side. If you have labels (i.e. sink / float), put the relevant materials under their relevant label.
It’s time to test! Start placing the objects into the water to see if they will float or sink!
Engage in discussion! What happened? Was your assumption correct? Why/why not?