This summer my son can play and learn about topics that might not come up otherwise. Reading about turtles or how one kind of fish lives is something that would only come up going here.
Babies can enjoy the wonders too just be sure to babywear and let them reach out and touch things. Keep little babies engaged by being more tactile. When they are over tired a nap in the baby carrier is easy and allows everyone else to keep having fun.
If baby gets hungry you breastfeed while viewing the jellyfish. This is so much fun and something my son and I always do as a little break in the action.
Toddlers are made for fun aquarium outings. Make sure you're playing and interacting with them about each area's unique topics. Every fish has a story. They'll learn more and gain a much deeper sense of fun that way.
Bring a picnic for the whole family and head to the playground after the aquarium for swings and snacks.