San Juan, Costa Rica

Here's a suggested itinerary for 4 days in San Juan, Costa Rica that meets all your constraints:

Day 1:

• Morning: Start your day with a visit to the La Paz Waterfall Gardens, a beautiful nature reserve that's perfect for families. You'll see stunning waterfalls, exotic animals, and lush gardens.
• Afternoon: Head to the town of Alajuela for lunch at La Carreta, a popular restaurant that serves traditional Costa Rican cuisine. After lunch, take a stroll around the town's central park and visit the Juan Santamaria Museum to learn about the country's history.
• Evening: Check into your all-inclusive resort, the Westin Golf Resort & Spa, Playa Conchal. Enjoy dinner at one of the resort's many restaurants and take a dip in the pool.

Day 2:

• Morning: Spend the day at the resort, taking advantage of all the family-friendly activities on offer. The resort has a kids' club, a golf course, and a spa, so there's something for everyone.
• Afternoon: Take a short drive to Tamarindo Beach, one of the most popular beaches in Costa Rica. Spend the afternoon swimming, sunbathing, and playing beach games.
• Evening: Return to the resort for dinner and some relaxation time.

Day 3:

• Morning: Take a guided tour of the Arenal Volcano National Park, where you'll see the famous Arenal Volcano and hike through the rainforest. The tour includes a visit to the hot springs, where you can soak in the warm water and relax.
• Afternoon: Head to the town of La Fortuna for lunch at Soda Viquez, a local restaurant that serves delicious Costa Rican food. After lunch, visit the La Fortuna Waterfall, a stunning waterfall that's perfect for swimming.
• Evening: Return to the resort for dinner and some family time.

Day 4:

• Morning: Take a guided tour of the Monteverde Cloud Forest Reserve, where you'll see a variety of wildlife and plants. The tour includes a visit to the Sky Walk, a series of suspension bridges that offer stunning views of the forest.
• Afternoon: Head to the town of Santa Elena for lunch at Tree House Restaurant, a unique restaurant that's built around a tree. After lunch, visit the Butterfly Garden and the Hummingbird Gallery.
• Evening: Return to the resort for dinner and some final relaxation time before your departure.

I hope this itinerary helps you plan your trip to San Juan, Costa Rica!