I'm looking for a new adjective

So please help me find new adjectives to replace the old ones because in my mind it's just setting oneself up for failure (or at least giving your power away to something you apparently have zero control over)

Here's what I mean. We all know the terrible two's - it had me shivering in my undies the night before B's second birthday. But with the end of her two's now fast approaching, I'd like a new, more positive spin on what to call the two's since they were anything but terrible.

We are now moving into the three's, I hear it's "terrifying three's". Great {sarcasm}. Perhaps it will be a bit terrifying seeing as in her three's B will get a new sibling, but expecting it to be earth shatteringly terrifying is just so negative.

Help me find more positive adjectives please?!