The author describes a scene in a bustling city park where families are enjoying the sun, picnicking on the grass, and children are joyfully playing. In this vibrant atmosphere, the author uses the word 'ebullient' to characterize the energy of the children.

To better understand this word in context, it is important to consider its meaning. 'Ebullient' typically refers to being cheerful and full of energy. In this context, the word emphasizes the lively and spirited behavior of the children as they engage in their playful activities.

Based on this understanding, which of the following words is a synonym for 'ebullient'?