And this is the process and the result.
(Sorry by my English... I hope that you understand the steps).
Step 1: Search the Side Face
I selected this dinosaur because it is very easy to recognize by the kids... and it looks not as complex as a T-Rex with a lot of teeths :-)
Expand the best view until the desired size.
I downladed other Triceratops views to get more details and complete the skull on last steps.
Step 2: Building the Base for the Skull
Both sides will be the base for our skull. You have to join them and hold with tape.
Step 3: Complete the Base for the Skull
Step 4: A Few Details to Look Better
And I hold all pieces with tape.
Step 5: Adding More Volume and Strength
Step 6: Painting
Step 7: The Result
I hope that you like it.