Hi there,
The Cowbell Exchange hasn?t had any new items in a while so here is a few suggestions!

Bronze:
Bed and Breakfast Boost
Dehidrator Boost
Farmers Outpost Boost
Sugar Spinner Boost
Candlemaker Boost
Jelly Maker Boost
Candle Maker Boost
Event Craft Boost

Silver:
Animal Boost (Half time for 24hrs)
Animal Boost 2 (chance to get 2 items when collecting animals)
Buildings Boost (Half time for all Buildings For 24h)
Buildings Boost 2 (chance to get 2 items when collecting)
Crops Boost 2 (chance to get 2 items when collecting)
Deliveries Boost (x2 coins per delivery plus higher chance to get special items)

Gold:
Pets! (maybe could change seasonally