The following is a breakdown of the different items:
Cupcake - Food (for speeding up processes)
Star - XP (for leveling)
Log - Wood (for building buildings or others)
Coins - Silver coins (for purchasing, in-game currency)
Machete - Machetes (for clearing the forest)
Gold Bars - Gold bars (for purchasing, in-game currency, premium)
Collectibles - These vary but you will see an item related to the item you are collecting from. For example if you are collecting from the strawberry bush you will see strawberry items.