Sample Itinerary for Portugal with Kids (1 yr old & a 5 yr old)?

Hi guys, we're planning a family trip to Portugal as we've heard it's a great place to visit. However, we'll be bringing kids- a 5 yr old & a 1 yr old! Any family-friendly sample itinerary for Portugal/Lisbon/surrounding cities? Recommendations for food, places to stay, cultural sights, and even a bit of nature? Thanks so much!