Fractals
Fractals is a pattern that repeats itself at every size, from big to small.
Think of it this way
A head of broccoli shows this pattern well. The whole head has a bushy, tree-like shape. Each small floret on that head has the same bushy, tree-like shape. Break off one tiny piece, and it still looks like a small broccoli head.
Explaining fractals by grade level
Look at a tree. The big branches split into small branches. The small branches split into even smaller ones. The same shape shows up again and again at each size.
