Two ways of going at this question. If you have ever seen the frolics of a kid then the answer is to have boundless energy jumping on and off of anything that gets in the way. Naturally, I am talking about a young goat. A bale of hay becomes a launching mechanism. A tower to observe the world. Two bales of hay become the peaks of two mountains that have to be traversed in great one leap. Playfully a kid hones its skills and masters gyroscopic balance.
Now, I know what you really meant with that question mark. In the world of Winnie-the-Pooh there’s one character that sums up being youthful, energetic, honest, haplessly and hopelessly optimistic. That fictional character is Tigger. To me he’s the most childlike of Pooh’s woodland friends. So, if you want to remain a child at heart think Tigger.
I suppose I could suggest a third approach. I could get all biblical and say: Truly I tell you, unless you change and become like little children, you will never enter the kingdom of heaven. That doesn’t answer the question. Instead it puts a lot of weight on being a “kid at heart”.
John Vincent 