The Question and Answer section for Rip Van Winkle and Other Stories is a great resource to ask questions, find answers, and discuss the novel.
The children follow Rip because they love him. He tells them stories, makes toys for them, plays games, shoots marbles, and teaches them to fly kites. Rip was fun..... just like a kid.
What note are you referring to?
From the text:
On waking, he found himself on the green knoll whence he had first seen the old man of the glen. He rubbed his eyes—it was a bright sunny morning. The birds were hopping and twittering among the bushes, and the eagle was wheeling...