J.W.
Disneyland is fun but can get expensive. Bring snacks and water or juice boxes in with you. Use a stroller for your 4 year old too as all the walking can really be tiring and it is easier to push a stroller than carry an overly tired child. I use to take my book so I could sit, read and people watch while my little one took a nap at the park. This works too when the little one is asleep and the older one is on a ride with the other parent. Be sure to get fast passes for any ride you want to go on. They give you return times for the ride but are good any time that day adter the return time. We try to get as many as we can early in the day and then go back at a time that is convenient for us. Most of all have fun.