Hello AnaPaula,
Welcome to planDisney and thank you so much for this special question! I have a little one right around the same age as your son - it has been so special to take trips with our kiddos and make new magical memories with them!
My recommendation to start planning your trip is to begin on the homepage
Disneyland Resort website. Near the top navigation bar, you'll see the "Build Your Vacation" tool. This tool makes it so easy to get the planning started for your next trip to the Happiest Place on Earth!
You can simply put in your check-in and check-out dates, how many will be in your party, and set your
hotel preferences then click "Find Rates." It'll then walk you through booking a hotel and then on to purchasing your
theme park tickets and
theme park reservations!
Once those are set, then I'd recommend bookmarking the
My Plans hub - it's a great place to make and manage all the different reservations for your upcoming trip. For example, when I took my son on a trip last year, I used the My Plans hub to book a time for us to build a droid in the
Droid Depot! It was really convenient to be able to do it all in one place.
Lastly, if you haven't already, make sure to download the
Disneyland Resort mobile app. It has all kinds of helpful features that you'll want to use during your visit like a map with filters for attractions, character experiences, and dining options.
My two favorite tips for visits with Mouseketeers under 5 are to utilize the
Baby Care Centers (they have toddler-size toilets and are a nice, quiet reprieve if you need time to reset), and plan to spend a good chunk of time in
Mickey's Toontown! There are so many different areas to explore in this area and you never know who you'll run into.
Thanks again for your question, AnaPaula! I hope you have a fantastic visit to the Disneyland Resort.
Have a Magical Day,
Greg