(topic: Timekeeping) - Dr. Marbles finds the encryptor chip (the computer chip that will enable Marbles to delete Motherboard's virus) in an ancient pyramid. But the Mummy who guards the pyramid finds Marbles. When the kids and Digit arrive, they must work their way through the chambers of the pyramid - find Dr. Marbles - and escape before a trap set by the Mummy seals them inside forever. How much time do they have? Unfortunately, they have no clock or watch to tell them how much time has gone by. Is the mission impossible? Not for our kids! The Big Idea: To measure the passage of time, choose a starting point and count up the beats of something that repeats at steady, regular intervals.