Five Star Gift Ideas

I would recommend the "Mayonnaise Making Kit" as a unique and personal gift for your mayonnaise-loving grandson. It is a complete kit with all the necessary ingredients and equipment to make homemade mayonnaise from scratch. Additionally, you could also consider getting him a cookbook with mayonnaise-based recipes, such as deviled eggs, potato salad, or creamy dips. This would allow him to explore different ways of using his favorite condiment and possibly inspire him to create his own recipe.

Or you can get him a star map with the date when he was born.