あたしは＝I am Children often use ''atashi''not''watashi'' Because ''wa''pronunciation is difficult for children. They want to say ''wa''but say''a''. Sometimes not only children but also girls and women use atashi. If girls use it,It looks like children. So cute. ね has no mean (sometimes include ''isn't it?'') filler if someone use ね It also looks like cute. I hope this helps.

How about the Glue words

「あたしはね」means" I am" and I looked up "glue word"in my dictionary for the first time in my life. Glue words look like "particles" in Japanese. ”は“and"ね“are particles here.