I have devised a modern art lesson called ‘Fun trees!’ Let me know what you think. 
Fun trees!
There were three big trees. Each tree had three main branches, with five sub branches on each main branch.
They were placed in a triangle.
The trees were labelled x, y, and z. The tree x was a third larger than y, and two thirds larger than z.
On each of the trees the main branches were called 1, 2, and 3. The main branch 1 was a third larger than 2, and two thirds larger than 3.
On each of the main branches the five sub branches were called A, B, C, D, and E. The sub branch A was a fifth larger than B, two fifths larger than C, three fifths larger than D and four fifths larger than E.
Strings connected the trees. For example. See the brackets below.
(a piece of string called x1A,z3E which connected the largest sub branch on the largest main branch on the largest tree to the smallest sub branch of the smallest main branch on the smallest tree.)
x1A,x1A was a loop. All the sub branches have loops attached. The following are strings attached to the trees:
x1A,x1B x1A,x1C x1A,x1D x1A,x1E x1A,x2A
x1A,x2B x1A,x2C x1A.x2D x1A,x2E x1A,x3A
x1A,x3B x1A,x3C x1A,x3D x1A,x3E x1A,x4A
x1A,x4B x1A,x4C x1A,x4D x1A,x4E x1A,x5A
x1A,x5B x1A,x5C x1A,x5D x1A,x5E x1A,y1A
x1A,y1B x1A,y1C x1A,y1D x1A,y1E x1A,y2A
x1A,y2B x1A,y2C x1A,y2D x1A,y2E x1A,y3A
x1A,y3B x1A,y3C x1A,y3D x1A,y3E x1A,y4A
x1A,y4B x1A,y4C x1A,y4D x1A,y4E x1A,y5A
x1A,y5B x1A,y5C x1A,y5D x1A,y5E x1A,z1A
x1A,z1B x1A,z1C x1A,z1D x1A,z1E x1A,z2A
x1A,z2B x1A,z2C x1A,z2D x1A,z2E x1A,z3A
x1A,z3B x1A,z3C x1A,z3D x1A,z3E x1A,z4A
x1A,z4B x1A,z4C x1A,z4D x1A,z4E x1A,z5A
x1A,z5B x1A,z5C x1A,z5D x1A,z5E x2A,x1B...
Imagine I had continued the table right down to z3D,z3E (or whatever the conclusion of the pattern is)
Now draw the trees, loops and the strings…
