Ah-HA! Perfect!

Tobias found exactly what he needed right there on his school jumper. He went and took a seat on the sofa (and finally noticed Ella sitting there reading a book... and decided not to disturb her 'cause they were each engaging in their own productivity) keeping hold of the long strand of wool that had frayed off and come loose from his jumper. The urge to try and pull it off was almost overwhelming.

Figuring this must be one of the jumpers from his first year, Tobias pulled the strand taut and lifted his wand again. As he tried to line up the magnifying glass with the sun at the right angle, Tobias couldn't help but notice that even though this jumper was clearly bought the summer before he started his first year it was no tighter on him than his newer clothes. Same for all of the clothes that he still owned from before Hogwarts. Gosh, how Tobias yearned for a growth spurt to come soon. He was thirteen now, and a lot of his friends were at least 5 feet tall.

Even the first years. A lot of THEM were taller.

Realising he'd quickly gone off focus, Tobias blinked and concentrated on the positioning of the magnifying glass. It seemed unlikely that the beam would hit such a small target on the first try, so it would take a few goes.

"Solis Focalis!" Tobias cast, and watched as the beam missed the thread, instead going three or so inches to the right and hitting him on the leg. "Ouch!" the Hufflepuff exclaimed automatically, even though it hadn't actually hurt at all. Just felt more of a jolt or a sharp poke, and he had spoken in surprise.

He adjusted his wand slightly and tried again.

"Solis Focalis!"

This time the beam went about half an inch to the left, hitting him in the leg again. Tobias was prepared for it this time. But this was definite progress, and he was much closer to the strand of wall. Tobias made more adjustments and decided that if this attempt wasn't successful he would have to give his arm a bit of a rest.

"Solis Focalis!"

Bingo! The concentrated beam of light shot at the thread at exactly the right angle, burning through the wool quite close to the jumper and leaving the end of the remaining strand sort of singed. Excellent! He totally KNEW it was a decent idea, but it probably would only work on really thin strands like these, because the leg of his trousers wasn't damaged at all. Handy!

Now he'd found one thread, Tobias was starting to find more everywhere. Right on the arm of the sofa was another loose thread, much thinner than the last one. Toby figured he'd do this one more time and then he'd be done.