Before watching this clip students could make predictions about how big the Sun is in comparison to the Earth. A small ball of modelling clay could be used to represent a scaled-down version of the Earth, and students could then be challenged to make a Sun in comparative dimensions. Students could then watch the clip to see if any of their predictions were close, and then make the correct-sized sun in comparison to their earth.
Students could also compare the size of the Earth to other planets in the solar system. They could have a solar system mural on the wall, each student could choose a planet to research, present their findings to the class and draw and add their planet to the solar system mural.