Yep. The liar phase. I'm not a child psychologist, but I play one at home. :)(okay, I'm 39, so most of you probably don't know that commercial and can ignore that!)
For starters, we chose not to use the word "lie" in our home. A lie quickly fuels the name calling, and being called a liar is hurtful. A lie is something told with disregard to truth or feelings. (I have a 9 year old, 5 year old, 3 year old who is currently going through the 'creative untruths' and a one year old, for reference!).
When my oldest starting telling 'untruths' I was mortified. I knew he must have inherited it from his Dad, so obviously I was married to a big fat cheating liar, right??? JK.
The main goal of this reply is to assure you that this too shall pass. Untruths become boring once they no longer elicit responses and we don't entertain the creativity. The challenge is to redirect the creativity into storytelling or something.
But here's what WE'VE done that works for us. Sometimes the untruths can be really serious. Things like "What happened to your sister? Why is she screaming hysterically??"
I explain like this: "If I don't know the truth, I can't fix the situation. My job is to protect all of my babies. I am not angry, I am concerned. You can be Mommy's really big helper by telling me exactly what happened so that I can be sure Fiona is okay! Can you help Mommy?" I'll admit, this is REALLY hard to do when the baby is wailing, but that's a serious example, when likely the culprit is looking right into your eyes saying he doesn't know what happened or that the one year old fell off a bike...
Typically it's more like "WHY is there an entire box of cereal ground into the carpet?" Naturally, it was once again Fiona. She used super strength to jump up to the tot lock on the pantry, chose Griffin's favorite cereal from the top shelf, opened the new box, found the toy, put it together and then proceeded to smash the entire box of cereal in a rain dance. Hmmmm... So really the point here isn't to win the battle of the truths, it's to discredit the attempt. At this age, they aren't lying to get out of trouble. If I have the time (ha) I try to work with the untruth. "That is too funny! Did you help her up to the lock? You must be strong! Why did you let her smash the cereal? Well, next time could not let her do that? It makes a terrible mess and now YOU and MOMMY have to clean it up! I was going to read you a story now, but we need to clean this first. Maybe we'll be able to read a story later."
I know; easier to write calmly than to follow through with while remaining calm. Especially when there are other parents around, likely ready to accept that your child, because of a little untruth, is the next mass murderer. But I really do TRY. I've found that what they really are seeking is my undivided attention and devotion to them. That it doesn't matter what they say or do, I've got their back. If I can take a breather and remember that, I need less wine.
And remember, anyone who tells you their child has never told a lie either hasn't hit that phase or is guilty of telling untruths. :)
Okay; the one year old is in the "If I can reach it, it's going" phase and WE need to get out the vacuum to clean up the bag of bird seed that should have been on a higher shelf. Best of luck to you!