Excalibur JK13 Gross Master The Gross Master from Excalibur Electronics is a goofy-faced toy that provides hours of hilarious entertainment for kids! Press his nose for kid-friendly jokes or press his left eye for gross noises that will keep kids laughing! The Gross Master features volume adjustment, a play time of 15 minutes and is suitable for children 5 years and older. Three AAA batteries are included.