Can you help me come up with Ideas for a minecraft birthday party quest activity?

Minecraft players, help me design a tresure hunt for my sister's Minecraft themed birthday party.?

My sister (Who's nine) loved Minecraft. I'm trying to surprise her by making an adventure tresure hunt that resembles what you might do on Minecraft. I thought I'll make chests out of cardboard or whatever, and put notes in them saying where to go next, and before they can get to some of the cests, the kids have to complete a challenge. Then at the end they find some 'diamonds' which is whatever candy I hide for them. Challenges I can think of are; jumping over furniture (The floor is lava) from one side of a room to another, crawling under a tunnel (caving) I'm a totally new player to Minecraft, so I thought I'd ask for some ideas on Yahoo. It doesn't all have to be indoors stuff, in fact, I could spread chests all around the neighborhood.