I went to the Goodwill Book Store in London and picked up a whole whack of books. One of them was this book by Etta Kaner called Bridges.
I started reading through it with the lad while he was digging in his dinosaur egg. We got intrigued…. Being intrigued in our household means let’s experiment and see what happens.
Chapter One is on Beam Bridges.
HAH! Easy enough to experiment with these! And besides…the book clearly lays out the experiments one can do.
We started with Page 7, build a beam bridge. All we needed was two bricks, paper (used cardstock) and plasticine (or some other such modelling clay).
easy enough…set up your bricks. Place a piece of cardstock over it. How many plasticine bricks will it hold? We learned it ALL depends on where you place them. Smack dab in the middle…Three MAX. BUT if you put some on either end before you put them in the middle it will hold more. SEE …..
We made a waffle bridge… and WOW!! that just amazed us. We put ALL the plasticine we had on top and it didn’t break! One end crumpled a bit but that we think, was due to mommy’s poor folding job at that end.
So we tested out different types of columns. Square, Triangle and Rectangle
the triangle really started to quiver and shake
I had no answer for him….do any of you???