I choose to use thumb sucking as my issue for childhood development. I think this is an interesting issue, and I picked it because even as a child this was something that I didn't understand why people did it. I never sucked my thumb, and so this seemed strange to me. I remember being in grade school and there were still kids that sucked their thumbs and they got made fun of for it. I am pretty sure that the ridicule that they got for that probably made them stop doing that, but I would guess that they developed other issues to replace the thumb sucking issue. I did have a niece that sucked her thumb even after she started grade school, she mostly just did it at home after that.
Babies have a natural sucking reflex and this can cause them
Babies have a natural sucking reflex and this can cause them