I like the incorporation of the child climbing the ladder on a tree. Perhaps having the ladder leaning against other objects and the child climbing to reach a goal (e.g. apple on the tree)
If there is a way to incorporate the ladder into the word (as a few others have the ladder serving as the I in each word) and also a tree or other object that the child is reaching for it could be very cool. Also try the child as a more stylized, rather that lifelike, figure.