how do i help my 3 yr old retain information

repetition

Yep, you say it over and over and over again tell they keep it in their little brain. At that age they forget very easly.

Pertaining to what specifically? Repetition will work, flashcards are great and you can make it a game. The Memory game is great at this age for building their memory. When you finish reading a story, ask him specific questions and see if he can remember. Then ask him the same questions a few hours later.

Honestly, one of the striking things about 3 year olds in my experience is their ability to retain information & their amazing capacity for remembering a LOT! I think it comes naturally for children of this age to easily remember anything that captures their interest/attention, fires their imagination or inspires love or excitement/enthusiasm in them. I mean, this seems to be their nature,

Does the child seem unable to remember details from your day or from the stories you read together, so you're worried about memory/comprehension specifically, or is it more about wanting him/her to learn certain information & finding that it is a struggle?Maybe take a look at the information you're hoping your 3 year old will retain, and see if it's important at all to your child. Does he/she see the point, or understand the information? Is it abstract, not directly linked to meaning/purpose? It may feel like a chore to the child.