Fall fest idea: Penny Drop Inexpensive game using a fish tank, jar, water and pennies! Great for an ocean theme party or an outdoor party with carnival style games. MATERIALS - Aquarium, Small glass vase or jar, Water, Pennies INSTRUCTIONS - Fill tank with water. Place jar in tank. Drop pennies and if it goes into the jar, it's a winner. TIPS - Weigh down jar with pennies if needed.