Hi! There are certain in-game values that can be traded: like basic types of Resources and Scrolls. However, there are also many other non-tradeable in-game Items and Resources. We are not planning to give you an option to trade them or send them as a gift to other players.
The reason is that we're striving to maintain the game balance. Players receive a lot of Items that should be used on certain levels or Castle development stages. However, they are credited for your personal in-game activity, and they were not designed to give any benefits to other players.