Elrond and Thranduil entered the hallway and met with Legolas and
Estel. "Where are Elladan and Elrohir?" asked Elrond. "We wish to
speak to all four of you at one time so there will be no
misunderstandings."
"They are in my room, Ada. They're waiting for us," replied Estel.
Just then, Glorfindel came into view and Elrond motioned him to join
them.
The twins came to their feet as the group entered. "I will only say
this once - THERE WILL BE NO PRANKS, NO TRICKS, NO ACCIDENTS
tonight. Is that clear?" Elrond looked at the four elves and the
human. All five just nodded. "Good. Enjoy yourself."
With that, Elrond and Thranduil left. Glorfindel said, "I believe he
meant that." The other four just looked at him as if he had sprouted
horns.
That evening:
Elladan and Elrohir entered the lavishly decorated dining area. It
had been turned into a summer wonderland, with flowers and blooming
plants hanging everywhere. They walked to where Elrond was
standing. "Mae govennan, Ada" they said.
Elrond looked around. "Where are Estel and Legolas? Aren't they
coming?"
"They'll be here, they were dressing when we came down. Ah, there
they are."
Elrond saw them as they entered the room. The elf-lord was  happily surprised
to see the way they were dressed.
The two friends looked as if a sunbeam and a moonbeam were standing
side by side.
Legolas was dressed in robes of green and gold - his robes were as
the green of the trees, while his mantle was as the gold of Anar's
rays. His hair was worn in the warriors' braids he favored. He
looked every inch the Prince everyone knew him to be.
But Estel - Elrond was stunned when he saw his foster son. Estel had
on robes with the colors of his beloved Rivendell-the blue of the
sky, and the silver both of the rivers of Rivendell and the silver
of Isil, the moon. He wore a mantle of silver over his blue robes.
His hair was also worn in warriors' braids. He had no circlet on his
head, but he needed none. There was a power there that showed what
he would someday become.
He walked over to his father. "Mae govennan, Ada. I hope you
approve." Estel stood there, not sure of his father's reaction.
Elrond's eyes were shining, as if he were holding back tears. "Ion
nin. I am delighted to see you wear the garb of our people. I am at
a loss for words only because I was not expecting it. I am honored
and very pleased. Diola Lle. I am very proud of you." With that,
Elrond hugged Estel.
Estel whispered "Lle creoso. Most of the thanks should go to
Legolas. He was the one who helped me."
Legolas stood there, with a pleased smile. "Mae govennan, Ada"',
said Legolas to Thranduil. The King of Mirkwood looked inordinately
pleased as he turned to his son. "Ion nin, you did a good job on
Estel. I have never seen him dressed in robes. Diola Lle. I am very
proud of you."
Legolas gave his father a hug as well. "Lle creoso."
Elrond gathered everyone and said, "I know you are all waiting to
eat. Tula, vasa ar' yulna en i'merith. Valina. Please join us in the
Hall of Fires, tonight." With that, the feast began.

Translations
Ion nin - my son
Diola Lle-Thank You
Lle creoso - You're welcome
Tula, vasa ar' yulna en i'merith - Come, eat and drink of the feast.
Valina - Enjoy yourself