My grandson was 6 months old when we visited Orlando, Florida. Here are some of the trip and tricks I used to get some great photos of him.
GET A VARIETY OF PHOTOS
TIP #1 - Get photos of them interacting with the characters
Capture them making eye contact with the characters. This is one of my favorite photos.
Little Man loved touching the fur on the characters. You will see him reach over and touch their furry hands.
Some children may be fearful of the characters. Don't stop taking photos if they cry or make funny faces. Of course, I'm not suggesting that the kids be forced to interact with the characters, I'm saying if they hide behind your legs because they are shy ( like I was) , get that photo. It will be fun for them to look back on when they are older and their girlfriends or boyfriends visit.
With interaction photos, the point is the capture their true reactions, not just the ones that look "good."