Cardboard 'Jacob's Ladder' - Tumbling Gorillas

Step 4 Glueing together

Lastly is to glue the notorious column 'circle' and column 'triangle' together.

Now you should have the two columns layed out as before, now get your top 'set' in column 'triangle', and the top blank card of column 'circle', smother the top side of the blank card with glue, and flip both inwards together, with the top card of the set of two, joined with the blank card. Then get the top set of column 'circle' and the bottom card of the set you just glued, lather with glue and join, repeat all the way to the bottom.