iKnowthat.com has online multimedia educational games for kids in grades PreK through 6 (ages 2-12).

Optics Workbench Activity

In this activity, kids learn all about light and the properties of mirrors, lenses, and prisms.  The workbench is stocked with light sources of different colors.  There are also a variety of shapes that can be set to be opaque or transparent.  These shapes are flat, convex, concave and multi-sided.

Kids can experiment with different combinations of light sources and objects.  They can figure out how to bounce and bend light (reflection and refraction).  Kids can also make color spectrums from white light that is passed through a prism.

Optics Workbench can be used to teach and demonstrate concepts related to several science standards and benchmarks for 1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade. Kids can save their projects at the site.  And they can show their optics science projects to family and friends.