The great pilgrimage, as described in the Weird Al song "The Biggest Ball of Twine in Minnesota" must be made every four years on February 29. In accordance with the teachings of The Prophet of Education, you need to bring offerings for the twine ball monster in case it hatches in order to complete the pilgrimage. Acceptable offerings include:
Potato Skins
Pickled Wieners
Crossword Puzzles
Spider-Man Comics
Homemade Rhubarb Pie
Diet Chocolate Soda