My daughter started to remember them and tell us about them a few months ago (about 3.5 yrs).

This morning, DD1 was telling us about a dream she had where she was playing with her sister (DD2) and DD2 jumped into a puddle that was so deep that DD1 couldn't reach her to pull her out. She said she tried and tried to reach for her but it was too deep and DD1 was scared because she knew that DD2 was going to die.

I started tearing up when she was telling me about it - I feel like she's too young to have dreams like that.