I'm impressed. It's a credit to you that your family responds to good light. It's usually overlooked in manuals on child rearing. My kids became hostile about National Geographic red jackets for birthdays.
All the proportions here feel right. The grandson is large enough in the shot to make the most of his good looks. We have enough of the trees and the reflections to share the location. The splash is easily seen and adds youthful energy.
A note on the colour. I previously suggested that The greens and blues in the shot from Fireplace looked a bit yellow. To a lesser extent, I thought the same here. It's me. You have more blues in your shot and I don't see any yellow cast on them.