New Challenge: The Smithsonian University!

Requirements: the chests will be received by players level 15+
Main reward is the Smithsonian University (5,100 coins, 3-5 energy, 3-5 candies every 24 hours, size 7*9, can be placed anywhere except the Snowy Plateau).
Each chest can be opened for 9 Autumn keys.
There are 3 ways to get Keys:
1. Complete the quests:

Ingenious Invention I (2 keys)
Collect 11 Trowels (Subway Station, Upgraded Subway Station)
Collect 23 Pistons (Shoe Shop, Upgraded Shoe Shop)
Collect 19 Ropes (Textile Factory - all, Upgraded Textile Factory - Wool, Felt, Cashmere)

Ingenious Invention II (2 keys)
Ask friends for 8 Repair kits 
Collect 3 Lenses (Electronics Plant - all, Upgraded Electronics Plant - Mouse, Smart watch, Headphones)
Collect 26 Saws (Colonial House, Upgraded Colonial House)

Ingenious Invention III (3 keys)
Collect 9 Sensors (Water Tower, Upgraded Water Tower)
Collect 8 Screw Wenches (from friends’ cities - buildings with a clock or coin)
Collect 17 Planks (Cargo Port)

Ingenious Invention IV (4 keys)
Collect 41 Glasses (Summer House, Upgraded Summer House)
Collect 29 Spring rolls (Bistro, Upgraded Bistro)
Collect 15 Pencils (Stationery Shop, Upgraded Stationery Shop)

2. Collect profits from the following buildings:

  • Autumn Park - 1 key every 12 hours;
  • “Campos Eliseos” Theatre - 2-4 keys every 20 hours;
  • School of Science and Art - 3-5 keys every 18 hours;
  • Grauman’s Theatre - 2-4 keys every 18 hours;
  • “Melaka Straits” Mosque - 2-4 keys every 24 hours;
  • Natural History Museum - 3-5 keys every 20 hours;
  • Bridge - 1 key every 24 hours.

    3. Use the sale offer!

    Special Offer


    Museum of Natural History: 4,500 coins, 2-4 energy, 2-4 candies, 3-5 keys during the Smithsonian University chest event every 20 hours, 80 marathon points one time when buying;
    “Melaka Straits” Mosque: 5,100 coins, 2-4 energy, 3-5 candies, 2-4 keys during the Smithsonian University chest event every 24 hours, 80 marathon points one time when buying;
    “Grauman” Theatre: 3,800 coins, 2-4 energy, 2-4 keys during the Smithsonian University chest event every 18 hours;
    “Campos Eliseos” Theatre: 3,000 coins, 1-3 energy, 2-4 keys during the Smithsonian University chest event 24 hours;
    School of Science and Art: 3,700 coins, 2-3 energy, 3-5 keys during the Smithsonian University chest event every 18 hours.