Informal indoor and outdoor activities are provided. The skills to be used are observing, communicating, replicating, and manipulating.
Some objects are sources of light.
Objects can be seen only if they are actual sources of light, or if they reflect light that is shining on them from another source. An object can interact with light by reflecting the light that falls on it. An object's interaction with light depends upon the nature of the material that the object is composed of. Transparent objects, such as glass and plastic wrap, allow light to pass through. That is why you can see clearly through these materials.