Hang this photo up where your students can see it.
Get the students to guess how many kajillions of plastic jugs were needed to make this dome. Older students need to guess how much juice/milk was gulped down, and then there’s that whole landfill discussion you might want to get into.
Of course you really need to ask them, “So….how fast can you bring in empty milk and juice jugs from home so that we can make this igloo?”
Get your glue gun ready!
[atgeist on flickr]