![JAPANESE NOTAN – Positive/Negative Shapes](https://static.crayola.ca/uploads/lessonPlans/japanese-notan-positive-negative-shapes/c74114184252612ad9d8dffa5e6cd065-cover.png)
THE BULGE – Creating Optical IllusionsStudents use coloured pencils and The Bulge worksheet to create an optical illusion of 3-dimensional spheres on a 2-dimensional surface.
Students use coloured pencils and The Bulge worksheet to create an optical illusion of 3-dimensional spheres on a 2-dimensional surface.
![THE BULGE – Creating Optical Illusions](https://static.crayola.ca/uploads/lessonPlans/the-bulge-creating-optical-illusions/0342efd16e484cf56ebc05433c91e06e-cover.png)
Supplies:
- Crayola Coloured Pencils - 24 Count
- Crayola Scissors
- Rulers
- Erasers
- Pencils
- The Bulge Worksheet - 1 per student
Steps:
1
![Step 1](https://static.crayola.ca/uploads/25b2060a1a1649f61bed1177b31d71b3-stepSml.png)
- Follow the instructions on The Bulge worksheet. (Downloads - BULGE.pdf)
- Cut out the circles to use as tracers.
- Decide how many circles you want to use in your design.
- Arrange the circles in the square and use a pencil to trace around them.
2
![Step 2](https://static.crayola.ca/uploads/5fdfbfae63bbe3fc4b7fc5a67407b4a3-stepSml.png)
- Use a ruler to draw horizontal and vertical lines to connect the dots on the sides of the square.
3
![Step 3](https://static.crayola.ca/uploads/0e2b498bd4671628fd1f24acdf032e09-stepSml.png)
- When you come to the circle gently curve the lines as if you are moving over the surface of a sphere.
4
![Step 4](https://static.crayola.ca/uploads/7716c2ba07fa3034d8dfd1e41a471f2a-stepSml.png)
- Once all the lines are drawn you may want to go back and double them.
5
![Step 5](https://static.crayola.ca/uploads/4b6e5bb2bd550f65bd5b0926078afbe9-stepSml.png)
- Colour in the spaces using a variety of coloured pencil techniques.
Subjects:
Language Arts,
Mathematics,
Visual Arts
Grades:
Grade 4,
Grade 5,
Grade 6,
Grade 7,
Grade 8