Make the tallest tower, with 3 different versions. Cocktails sticks, spaghetti & marsh mellows, boxes and cardboard.
Cocktail Sticks, Spaghetti, Marshmallow's, Cardboard Boxes, Elastic band's to hold it together
Start with first tower made out of - Cocktail sticks and Elastic Bands
Talk about how height and stability and talk about how they could make a better tower out of; spaghetti & marsh mellows.
Same again, but with cardboard, boxes and what ever else they can find.