What does it mean when a baby is blowing spit bubbles?

When a baby is blowing spit bubbles, it typically indicates that they are exploring their oral and vocal abilities. This behavior is common in infants as they develop muscle control in their mouths and learn about sounds and textures. It can also be a sign of teething, as the extra saliva produced can lead to bubbles forming. Overall, it's a normal part of development and often a sign that the baby is content and engaged.