I'd be delighted to help you plan a wonderful 5-day family trip to Delhi. Here's a fun-filled itinerary for you:

Day 1: Arrival in Delhi

• After checking into your hotel, head to India Gate in the evening for a leisurely walk and some street food.
• Enjoy a delicious dinner at a local restaurant serving authentic North Indian cuisine.

Day 2: Old Delhi Exploration

• Start your day with a visit to the iconic Red Fort, followed by a rickshaw ride through the bustling streets of Chandni Chowk.
• Explore Jama Masjid, the largest mosque in India, and don't miss out on trying some famous street food like parathas and jalebis.
• Visit the historic Gurdwara Sis Ganj Sahib and experience the peaceful atmosphere of this Sikh temple.

Day 3: Cultural Day

• Begin your day with a visit to the magnificent Humayun's Tomb, a UNESCO World Heritage Site.
• Explore the vibrant and colorful markets of Dilli Haat, where you can shop for traditional handicrafts and enjoy local street food.
• In the evening, attend a cultural show at the Kingdom of Dreams, showcasing India's diverse art forms.

Day 4: Modern Delhi

• Visit the impressive Lotus Temple, known for its stunning architecture and tranquil surroundings.
• Explore the National Museum to learn about India's rich history and heritage.
• Spend the evening at Connaught Place, a popular shopping and dining destination, perfect for some family time.

Day 5: Day Trip to Agra

• Take a day trip to Agra to visit the iconic Taj Mahal, one of the Seven Wonders of the World.
• Explore the Agra Fort and enjoy a traditional Mughlai lunch at a local restaurant.
• Head back to Delhi in the evening and relax at your hotel or explore the local markets for some last-minute shopping.

I hope this itinerary helps you make the most of your family trip to Delhi! Let me know if you need any more suggestions or assistance. Have a fantastic time exploring the vibrant city!