Deciding when to use 就像 vs 像是 vs 像
in 就像, 就 means "just", so 就像 means just like and there is also 就像是.
So the real problem is to distinguish 像是 and 像.

As a native speaker, I think 像 can always substitute 像是 but 像是 can not always substitute 像. 

In your example, if I change it to 像是夏洛特·纳尔逊这样的孩子，他们喜欢一醒来就打开任天堂Wii U. Then it sounds weird.

Or 这孩子长得像你。 This kid looks like you.

will sound weird if you say: 这孩子长得像是你.

To be honest, it's hard to tell the difference even as a native speaker. So I suggest you to use 像 always. It won't make mistake at least.