Is it possible to make Jello using fresh pineapples instead of canned pineapples?

http://www.all-science-fair-projects.com/project484_39.html

MATERIALS:

• Fresh pineapple, 1 (can be frozen and used later)
• Canned pineapple, 1
• Jello , 2 small boxes any flavor
• Bowl, 1
• Boiling & Cold water, 4 cups each
• Spoon, 1
• Paper cups
• Knife, 1

PROCEDURE: 
If students will eat the gelatin desserts, follow standard sanitary precautions. This is intended to be a demonstration lesson.

1. Cut the fresh pineapple into cubes.
2. Make Jello according to instructions on box.
3. Put one piece of canned pineapple into half of the paper cups and one piece of fresh pineapple into the other half of the cups.
4. Refrigerate until set. It usually takes longer than one period.
5. Assign homework: "Which Jello would you like tomorrow and why?" or some sort of variation on that theme.
6. Serve and observe.
7. Follow-up question: "What is meat tenderizer and what does it do?"