overly excited
Being too excited about a minuscule idea, activity or item.
Hey! Look at this new video game I got!
OH MY GOD OH MY GOD WOW OH MY GOD THAT'S AMAZING. HOLY COW. CAN I TOUCH IT?
You're being overly excited.
OH MY GOD OH MY GOD WOW OH MY GOD THAT'S AMAZING. HOLY COW. CAN I TOUCH IT?
You're being overly excited.