Normally most people begin by orienting themselves to the task. They talk about what the finished structure might look like, and who does what.
Then the team plans. They sketch, lay out spaghetti sticks and describe the best ways build the structure.
Next, they assemble the sticks and tape them into ever growing structures.
And finally, just as the time is running out, someone takes the marshmallow and gingerly places it on top of the fragile structure. They anticipate that they stand back

'ta-dah!!!' .
But usually, the 'ta-dah' turns into an 'oh-oh!!'  The weight of the marshmallow causes the structure to buckle and collapse .

Designers recognize this type of collaboration as the essence of the iterative process - which is central to design thinking. With each version, the kids get instant feedback of what works and what doesn't. Through play and prototyping, they instantly adapt to what's in front of them.

Link to Video: https://www.youtube.com/watch?v=1U2gngDxFkc

Link to Video: https://youtu.be/1U2gngDxFkc