There was this thing about spending less time with the second born. Recently, as he grew older and gotten more aware of surroundings, X would ask for things.
Such as asking to go for soccer, asking to go for evening swims, asking to be taken out and more.
I realized he was a fast and keen learner.
One night, I digged out the stash of Thomas the train storybook collection and X was hooked. It helped that with a bigger bed, we could snuggle up with him on his bed. It was very fun to relive the Thomas storytelling days.