Other
Center for Science Education: Eye on the Sky: What Makes Day and Night?
This activity will allow you to model day and night cycles. A rotating student holding a map (provided) models the earth. A lamp is used to model the sun. Numerous worksheets (pdf) and additional website resources are also provided.
Other
Center for Science Education: Eye on the Sky: Motion of the Sun and Earth
Students model the interaction of the earth and the sun. The activity is designed for the playground. You will need chalk, but all the other worksheets are provided.