Can Pack of Wonders return a trashed gear or unit back into the player's hand?

Ruling: Pack of Wonders cannot target cards in the trash. It can only affect objects in play on the board.

Sequence:

• Pack of Wonders can only target "friendly" units or gears
• "Friendly" means something you control
• You only control game objects that are on the board
• Cards in the trash are not controlled by any player
• Therefore, Pack of Wonders cannot target cards in the trash

Nuances:

• Unless otherwise stated, cards can only affect objects in play
• While cards in the trash retain the properties of being a unit/gear (like might, cost, effects), they are treated as "cards" not as units/gears for targeting purposes
• The properties are retained for the purpose of other effects that specifically target cards in the trash