They won't be three forever! Their understanding and needs will grow and change as they get older.
Conventional parenting is not about being present with kids. It's about giving kids rules as a replacement for being there. Same can go for information. Information shouldn't be a substitute for being there and being aware. We should let kids know that cars can hurt them, which is why we steer them clear of the street. But we shouldn't then depend on kids understanding. We need to be there. We need to be aware of our child's tendencies to run to the street when in that type of situation. We need to avoid as much as we can places where they can run into the street until they can understand.
photo by Sandra Dodd