Requirements: level 15+

In this event, you can open chests and receive guaranteed prizes from each of them.
There are 45 chests in total and rewards drop on a random basis.

The main reward is Puppet Theatre, size 7*9, can be placed anywhere
Every 24 hours:
4200 coins
1-3 energy
1-3 pearls

Each chest can be opened with 9 summer keys
There are 3 ways to get the Keys:

1. Completing quests
Key quests will appear one after the other in the menu on the left side

Croissants at the Fair I
Collect 10 Spools of thread (Textile Factory - any product, Upgraded Textile Factory - Wool, Felt, Cashmere)
Collect  10 Saws (Colonial House, Upgraded Colonial House)
Collect 2 Pins (Fashion Boutique, Upgraded Fashion Boutique)

Croissants at the Fair II
Collect 10 Potions (Pub, Upgraded Pub)
Ask friends for 5 Cups of Camomile tea
Collect  12 Freeze gel tubes (Convenience Store, Upgraded Convenience Store)

Croissants at the Fair III
Collect 27 Towels (Recreational Cottage, Upgraded Recreational Cottage)
Collect 6 Bars of soap (Cosmetics Boutique)
Ask friends for 5 Paintbrushes

2. Collect profits from certain buildings:
Saint Martin Church: 2-3 keys every 24 hours
Ateneum: 2-3 keys every 24 hours
Scout Camp: 1 key every 8 hours
Lighthouse: 1 key every 24 hours
Nobel Prize Museum: 2-3 keys every 24 hours

3. Purchasing keys from a special offer

Unique offer: Saint Martin Church, size 8*6, can be placed anywhere

Every 24 hours:
4000 coins
1-4 energy
1-4 pearls
2-3 summer keys during the promotion