I would use the Activity Set: The Planets in my class.
To begin, I would introduce the planets to the class. I would use visual aids and the IWB to display pictures on the different plants and how they differ from one another. I would tell the children the names of each of the planets and chose 8 individual children to stand at the top of the room. Each of these children would be given a label with the name of a different planet on it. The class would work to put the children in the correct order of the planets (the order could be displayed on the IWB in the background to assist them). I would then play ‘The Planets song’. We would listen to it twice and I would ask the children to join in with it. I would then go on to play The Planet Game with the children on the IWB for a few minutes. We would then finish the lesson with The Planet Dance.