When I brought out the spaghetti and marshmallows I think my children thought we were having some kind of weird and wonderful ( to them ) dinner, not building structures.
This is a great activity for children of most ages as you can tailor it to their understanding. I let my 2 year old just build whatever she wanted, and she had a great time working out how to put the spaghetti in the right places. With my 4 year old we were a bit more structured and tried to build a tower.
What you need
Spaghetti ( uncooked! )
What to do
Snap the spaghetti into smaller pieces.
Push the ends of the spaghetti into the marshmallows to build different shapes for your tower.
We started with a cube but when we put weight (Pooh bear in our case) on, it started to lean very precariously to the right and one of the spaghetti vertical pieces snapped. We then discussed what we would do to make it stronger. We decided to add some diagonal pieces which seemed to do the trick.
We thought it would then be quite good fun to mess about trying lots of different shapes and see if we could break them. Straight lines and marshmallow corners tend to lead pretty much to triangles but we had a lot of fun with other shapes too.
The Science Bit
Cubes tend to make stable structures, especially if they have diagonal pieces to strengthen the sides.
Can you show us some structures you have made?