SpongeBob Car Alarm Key Set by Creative Designs International, Ltd.. $8.39. Approx 5.5" (14 cm) inches in length. Realistic Car Sound Effects. Recommended for Ages 3 & up. Spongebob keys make mulitple sounds for hours of fun for your little driver. Comes with Key Pad & 3 Plastic Keys. A car alarm key set like the one Spongebob would have himself.