And round about them will (serve) boys of everlasting youth

Al-Insan/ Man

The Boys and Servants:-
Allah says,
"And round about them will (serve) boys of everlasting youth. If you see them, you would think them scattered pearls." [76:19]
- meaning, young boys from the boys of Paradise will go around serving the people of Paradise.
"everlasting youth." meaning, in one state forever which they will be never changing from, they will not increase in age.
- Concerning Allah's statement, "If you see them, you would think them scattered pearls." meaning, when you see them dispersing to fulfill the needs of their masters, their great number, their beautiful faces, handsome colors, fine clothing and ornaments, you would think that they were scattered pearls. There is no better quality than this, nor is there anything nicer to look at than scattered pearls in a beautiful place.
Allah says,
"And when you look"
- meaning, `when you see it, O Muhammad.'
"There" meaning, there. This refers to Paradise and its beauty, its vastness, its loftiness and the joy and happiness it contains.
"You will see a delight, and a great dominion."
- meaning, there will be a great kingdom that belongs to Allah and a dazzling, splendid dominion.

Wow...read this ayah again! 
"And when you look there (in Paradise), you will see a delight (that cannot be imagined), and a great dominion." [76:20]

Allahu Akbar! May we experience that, I.e, looking at, and entering Paradise.. a beautiful place! So beautiful its unimaginable! Ameen