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Minor Versionm

by Procheta Mallik


Starting with an A4 sheet of paper, we convert it to a size such that its length:breadth is 2:1. Making various folds and creases on this paper, it is possible to mould it into a "3D flexagon" with 4 faces, and on each face you may depict one step of the nutrient cycle with the stickers provided.


  1. Take an A4 size paper
    • Take an A4 size paper

    • Fold the paper into half

    • Then fold one of the corners to the edge of the opposite side of the paper to create a right-angled triangle plus a rectangular strip below

  2. Cut off this extra rectangular strip
    • Cut off this extra rectangular strip

    • Unfold the right-angled triangle and notice a rectangle made up of 2 squares; i.e. length:breadth is 2:1

    • Again fold both the edges along the mid line to get a long doubled up rectangular strip.

    • Fold the strip in half to get the halfway line

    • Fold the edges to the halfway line to get the quarter lines

    • Fold the edges to the quarter line to get the 1/8th lines on both the sides

    • Take one edge and crease it to one fold to get 1/8th on the other side of the half. Repeat with the other edge.

    • Strip will be divided into 8 equal parts

    • Fold the paper in the middle leaving the open line outside

    • Draw a rhombus at the centre and 2 diagonals joining 4 corners

    • Repeat the same on the other side of the fold.

    • Tear one eighth of the strip off

    • Now sharply crease all the 10 slant lines with the help of a ruler

    • Tuck one section of one end into the other end to make a prism

    • Your prism is ready

    • Fold half diamonds on all sides to the inside

    • Fold 3 diamond-shaped petals to the inside on the top and bottom

    • Flexagon is ready to flex!

    • The folds and creases need to be neat and precise throughout

    • How many triangles are visible and what type of triangles are they?

    • Can you make a bigger model?

    • Observe if the direction of pictures are appearing in the same direction while continuously flexing for a long time

    • Can you make a flexagon with 3:1 or 4:1 ratio of sides?

    • Handle the scissors carefully

    • Take a printout of the different stages of the nitrogen cycle .

    • Pictures are self explanatory with brief description

    • a) Nitrogen Fixation happens in 3 ways

    • Cut 3 pictures of nitrogen fixation

    • Stick those pictures on one of the faces of the flexagon

    • b) Cut 3 pictures of Nitrification

    • Stick them on the subsequent face of the hexagon

    • c) Cut 3 pictures of Ammonification

    • Stick them on the next flexagon face

    • d) Cut 3 pictures of Denitrification

    • Stick them on the last flexagon face

    • Rotate the flexagon and enjoy the nitrogen cycle!

    • Explore the importance of nitrogen in soil

    • Try to find out about other nutrients in soil

    • What happens if nitrogen is imbalanced in nature?

    • We have so much nitrogen in air; how come it is so difficult to get into plants or into our body?

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