The challenge
How can one pencil create the illusion of a round object?
What you need
- Pencil
- Paper
- Eraser
- A round object and a lamp
Safety first
Adult guidance is recommended for younger children; keep small items away from very young children.
Before you begin
What do you predict will happen? Write down your idea before trying it.
Step by step
- Draw a large circle lightly.
- Look at a round object lit from one side.
- Shade the side away from the light with gentle layers.
- Keep the light-facing area pale and add a soft shadow beneath.
What did you notice?
Compare your prediction with what happened. What changed between the first and second attempt?
Why it works
Gradual changes in value help the eye interpret a flat drawing as a three-dimensional form.
If it doesn’t work
Check your setup, measurements and materials. Make one change at a time and try again. Results can vary.
Try next
Draw the same shape with light coming from another direction.