This looks like a complex robot but to build it is entirely easy and fun. Add come of your own touches to create a unique mechanical robot in just a few minutes. Simple tricks in here to create shadows and highlights will have you adding these to all your creations.
Create a rectangle for the body.
Use the Corner Widgets to round the corners.
Create a rectangle for the neck.
Create a Square for the head and use the Corner Widgets to round the corners.
Draw a line on top of the head. Use the Stroke Panel to add a small dot to the end of the line.
Add lines to the antenna on top the head. Round the ends of the lines in the Stroke Panel.
Add 2 circles for eyes and a rectangle with rounded corners.
Draw white lines over the mouth. Group all the lines and CUT the lines.
Select the mouth and choose the Draw Inside Mode at the bottom of the Tool Bar. Paste the lines and move them into position.
Click on the Draw Normal mode at the bottom of the Tool Bar when done.
Add small rectangles for ears.
Add rectangles for the arm joints.
Add larger rectangles for the arms.
Add smaller rectangles for the fore arms.
Draw a circle for the hands. Grab the Angle Widget off the right side of the circle and move it 90°.
Or use the Transform Panel to set the Angle Widget to 90° on the panel.
Place a smaller circle over the 3/4 circle. Select both and use the Pathfinder Minus Front Command.
Here is the hand.
Rotate the hands into position.
Duplicate the upper arms and use them for the legs.
Add a stroke to the hands, set the stroke to the OUTSIDE in the stroke panel.
Create a rectangle and round the corners to the max amount to create wheels.
Add some interesting components to the center of the robot. The wavy line is a line with the Zig-Zag effect on it with smooth corners.
Add some color to the center components.
Add color to the neck, arm sockets and the wheels. I added another white circle to the eyes.
I added 15% gray to the body parts, 30% gray to the forearms.
To add shadows to the body parts, create a rectangle with a 60% gray fill and 30% opacity. Copy the "shadow"
Select the arm and choose the Draw Inside Mode at the bottom of the Tool Bar.
Paste the shadow and move it into position. Click on the Draw Normal mode at the bottom of the Tool Bar when done.
Repeat the shadow process on the tops of all the body parts; head, arms, legs, neck. I added shadows to the interior components and the bottoms of the wheels.
Create lines with "hot dog ends" (rounded ends) and place them on one side of the body parts for highlights. Duplicate them and change the length to create long and short highlights. You have done a great job!