{
  "rubric": "Help the train move forward by typing the right answer to score, then click on the balloon and drop it on the correct wagon.",
  "attempts": "2",
  "case_sense": "0",
  "Questions": [
    [
      "1. The first set of teeth is called __________ teeth.",
      "milk"
    ],
    [
      "2. The pulp contains __________ vessels.",
      "blood"
    ],
    [
      "3. The bone-like substance that fixes the tooth to the gums is called __________.",
      "cementum"
    ],
    [
      "4.  A hole formed in a tooth due to decay is called a __________.",
      "cavity"
    ],
    [
      "5. We should brush our teeth __________ a day.",
      "twice"
    ]
  ]
}