Something is off with Hiro's sense of time. He's constantly late, and almost misses his curfew. Ruli suggests a trip to the library for a change of pace. They meet some unexpected visitors and learn the cause of Hiro's problems.
So you can materialize at will.
يمكنكم التبلوُر متى شئتم
Du kannst dich also
nach Belieben materialisieren.
Entonces,
pueden materializarse a voluntad.
Entonces,
podéis materializaros a voluntad.
Vous pouvez à volonté ?
Quindi potete materializzarvi quando volete.
Então dá para se materializar 
por vontade própria.
Значит, вы и сами можете это сделать.