Lasers
BNHA is owned by Kohei Horikoshi.
"What are they doing?" asks Momo.
"Apparently teasing Izuku and Ochako with the laser pointer," Tsuyu answers, watching from the kitchen sipping tea.
In the living room, two mischievous kids were smiling and having fun with laser pointers. Kota and Eri were using laser pointers to attract Izuku and Ochako's feline instincts. Plus they were giggling whenever the two older kids would, while stalking the red dot of doom, give their butts a little shake similar to how cats would do the butt wiggle while crouched real low to the floor prior to sprinting and pouncing whatever they were stalking and being predatory on. And it was oddly cute to see their tails twitch now and again, their ears flat, and their jaws twitching a bit with cat chattering.
"This is fun, Kota-kun," said Eri, slowly swerving her red dot and making it evade Ochako's pouncing. She giggles when Ochako would even do the cat butt wiggle thing before the pounce.
Kota was grinning. "I know, Eri-chan."
He had his red dot on the wall and Izuku would leap and paw at the wall, trying to slap that annoying red dot but it would always evade him. Thankfully, Izuku has not yet tapped into his Quirk.
Momo looks to Tsuyu.
"Should we stop this?" she asks.
"Nah. I'm having fun watching, kero," Tsuyu answers.
But the fun eventually does come to an end when, twenty minutes into the red laser pointer fun, Kota's laser skirts across the wall and to a window and poor Izuku dove at the dot and smashed through the glass. The breaking of the glass window snaps Ochako from her trance and she hurries over to check on her mate while Momo and Tsuyu went over to calm the two panicking kids down, whom had seen that and believed they were now in trouble. Thankfully, Izuku's sturdier than most and easily brushed it off. He even reassured the two that he was fine and that he was relatively unharmed. He confiscated the laser pointers though and had Momo properly dispose them so they wouldn't be used for nefarious cat-teasing purposes again. Oh, and don't worry about the whole broken window thing: Momo used her Quirk to make a replacement window that got installed in a matter of minutes. One of the perks of having parents who own a construction company is that Ochako's a handywoman with household repairs.
Laser pointers. Anyone else it's mildly annoying. Eri and Kota make anything adorable, though.