This time our challenge was to find out which shape of column was the strongest from a square-based column, a triangular- based column or a cylindrical column.

We quickly found that we could balance the most books on the cylindrical column.

The children were then given a further challenge to double the number of books that they could balance.  I was so proud of them as each group managed to double their original load.

Two groups excelled themselves by building structures that could balance over 45 books!!!