In a fantastic combination of technology and playful design, the BRIO Music Caterpillar offers your child a great opportunity to explore the fundamentals of music and sounds while creating their own melodies. By inserting the wooden pieces into the holes, a sound is produced each time. The head and tail of the caterpillar can be connected in ten different ways, with each connection producing a different melody. It's a perfect toy to enhance your child's senses and understanding of cause and effect.