Simplify the following text for a Grade 6 native English-speaking person.
Original: Tapestry is weft-faced weaving , in which all the warp threads are hidden in the completed work , unlike cloth weaving where both the warp and the weft threads may be visible .
Simplified: This means all the warp threads ( the ones that go up and down ) are hidden in the completed work . In normal cloth weaving both the warp and the weft threads can be seen .