Related Clues:

• Intensely interested
• Intensely excited
• Showing surprise
• Silenced
• Dumb-struck
• Eager, and then some
• Staring
• All het up
• At a loss for words
• Displaying awe
• Amazed
• Like a kid at the circus
• Visibly stunned
• Wide-eyed with expectation
• With mouth open