These are just suggestions.
I'm unsure as to why I lost my affinity for it.
I'm unsure why I lost my affinity for it.
Either way, my humble collection was rather, well, small
Either way, my humble collection was rather small.
I soon found myself rummaging through books, striving to find at least a picture that could guide me to what it was.
I soon found myself rummaging through books, striving to find at least a picture that could help me to identify it.
I feel that this trait of child-like curiosity has survived in me.
Since then, the child-like curiosity has survived in me.
Those little things that may seem ordinary are what attract me the most. There is a complexity inherent to them that I endeavor to comprehend.
Those little things that seem ordinary attract me because behind that simplicity there is a complexity that I endeavor to comprehend.
The small degree of intelligence that I have is worthless to me if I don't use it for the benefit of others
In my opinion, this sentence sounds jumpy because you didn't mention about using intelligence for the benefit of other people in the previous paragraphs.
The small degree of intelligence that I have is worthless to me if I don't use it for the benefit of others, and I hope that my child-like curiosity helps me augment my knowledge so that I am enabled to do so.
If you really want to write about helping others, maybe you can write in this way: I hope that my child-like curiosity helps me augment my knowledge, so that I am enabled to use it for the benefit of other people.
I like the last three sentences!!!! but I think it will be better if you can figure out a way to avoid writing three times "I'm that child".