You purchase both the boosts and wearables by tapping on the Treasure Chest at the bottom of either the Home screen or the tally screen at the end of a turn.
You will use the sand dollars you have earned while playing the game to purchase the individual boosts and wearables.
Tap on the items you wish to purchase.
You will use the sand dollars you have earned while playing the game to purchase the individual boosts and wearables.
Tap on the items you wish to purchase.