She now has an even more torn newspaper.

She finds the cross and tries to scratch it again. Outside the room.

She now has a scratched cross!

She furrows her eyebrows. "I couldn't scratch the cross nor rip the newspaper before. The cross could be easily explained, but the newspaper somewhat less so."

"...maybe this room makes these objects destructible again?" She walks out and closes the door.

She tries ripping the newspaper and scratching the cross once more.

Both prove fairly destructible. 

Even More Torn Newspaper and scratched cross, for her destroying pleasure. 

She finds the pencil and tries scratching it.

Nope. The pencil elects not to be scratched.

Kaede picks up on what her mother is trying to do and opens the door to the room again.

Scratch?

Nothing. 

Science seems to be working quite well, despite all those hinges.

And inside the room?

She now has a scratched pencil.

She taps it against the little table where the TV set is.

It will certainly tap against the table. 

That's about it, though. 

Aaaand outside the room?

It continues not to work.

"This room," she says carefully, "seems to have some very interesting effects on these objects."

"Do you think objects in general lose their magic if they get in there?"

"That seems to be the case, yes."

Kaede walks out and closes the room and furrows her eyebrows—

—then blinks and runs into her bedroom and grabs a flashlight from her backpack. "I had my backpack with me when I went exploring this room..." She shines a light on a wall.

And her mother tries to press her hand against the illuminated wall.

Her hand passes straight through the wall.

She furrows her eyebrows, and they perform the test again but inside the room.