Here, my son is tesselating shapes in his Singapore 5 math book.
Some shapes can tesselate; some cannot. ("Tesselate" basically means that a shape can
fit together over and over again with no gaps in between.) Sometimes, there is more than one way to tesselate--that is what he's discovering here.
Now to the REALLY fun part: When math and art collide!
My son started with a rectangle, cut a part from the back, added it to the front; then the same for the bottom and top. Do you see the fish?
He made each fish unique.
This was the assignment suggested in our Singapore Math book. (Which we just love!)
It is meant to resemble M.C. Escher's art.