Structural engineering

We have been discussing structural designs and today we had the challenge of redesigning our index card tower from Friday.  The children's goal was to create pillars that would be strong enough to hold textbooks.  They were given the supplies of:  6 index cards and masking tape.  After the pillars were constructed we tested them by seeing how many textbooks they could hold.  Here's some of the towers....

And the one that held the most (38 books)