Everdell · Board game rules
How do you pass cards in Everdell?
Quick answer
You cannot pass cards to other players in normal gameplay; cards are only given via specific card abilities like Teacher or Post Office.
Details
Everdell does not have a general card-passing mechanic. Cards move between players only through specific card abilities that explicitly allow it. For example, the Teacher card states: "When played and during Production, draw 2 cards. Keep 1 of them and give the other to any opponent." [p.18 — CRITTERS] Similarly, the Post Office allows you to "give an opponent 2 cards from your hand" as part of its worker placement effect. [p.20 — CONSTRUCTIONS]
The only other context where cards move is if you are required to give cards to an opponent and that opponent's hand is full (at the 8-card limit). In that case, the cards are discarded instead of given. [p.10 — DRAWING CARDS]
Watch out: The hand limit is strict—no player can ever hold more than 8 cards. If a card ability would give you cards and you're already at 8, you can only draw up to your limit.