Related Clues:

• Not at all bored
• Undivided, as attention
• Lost in a good book, say
• Engaged, and then some
• Not at all distracted
• All eyes and ears
• Fully engrossed
• Severely affected
• Riveted with attention
• Glued to the tube, say
• Like one diffusing a bomb
• Spellbound, enthralled
• Enthralled, captivated
• Infatuated with mittens
• Absorbed and enchanted