Hey there Marilyn,
Welcome to planDisney and thanks so much for your question!
The great news is that children under 3 years old get into the Disneyland Resort parks completely free and therefore do not need a ticket. So your 3-month-old is covered there. For your 2-year-old, the same applies - as long as they are under 3 at the time of your visit, no ticket is needed.
As you mentioned, the other child in your group does require a
ticket. Child tickets at the Disneyland Resort are available for ages 3 through 9, so you'll want to make sure you add one of those when you purchase along with a
theme park reservation for each day you plan to visit.
Mid-November is one of my favorite times to visit the Disneyland Resort, so I'm sure your group is going to have a lot of fun. You'll get to experience the Holiday season, and enjoy all the delicious treats and snacks that come with that time of year. Keep an eye on the
Disney Parks Blog for more details about all the fun.
Thanks so much for your question, Marilyn, and have an incredible trip to the Happiest Place on Earth!
Have a Magical Day,
Greg