When it comes to finding synonyms for the phrase "come alive," there are plenty of options to choose from. Some alternatives that could be used to describe a similar feeling might include "be invigorated" or "become animated." Another possibility might be "spring to life" as a way to describe something suddenly becoming more dynamic or active. For a more whimsical approach, one could use "burst into bloom" or "awaken from its slumber." Overall, the key is to find a phrase that accurately captures the sense of something coming to life and becoming more vibrant and active, no matter what words are used to describe it.