When someone thanks you for a gift, it's thoughtful to acknowledge their gratitude and respond graciously. Here are some common ways to reply back:
"You're welcome! I'm glad you liked it."
"You're very welcome. It was my pleasure to give it to you."
"You're welcome. I hope it brings you joy/usefulness."
"No problem at all. I'm happy you enjoyed it."
"You're welcome. It's always nice to see someone appreciate the thought behind a gift."
"You're welcome. Thank you for your kind words."
"Don't mention it. I'm thrilled you loved it."
"It's my pleasure. I hope it adds a little happiness to your day."
"You're welcome. Thank you for being so appreciative."
Remember to use a warm and sincere tone when replying, as it conveys your genuine happiness that the recipient liked the gift.