"Treasure hunt in the envelope" is a serie of quests with different stories and tasks. Every envelope contains location cards, artefacts, which help to solve the riddles, little prizes and instruction. My task here was to draw the world of the game, to create characters and to come up with the general design of the treasure hunt, including the illustrations for the envelope itself. The first treasure hunt brings the participants into a fairy land inhabited with mysterious creatures. This tresure hunt is also published in English. Another brings the participants into a small village. One more treasure hunt is made for older children and is dedicated to a library.