Hi Swani!
Congratulations on your first trip! I can imagine how exciting this must be for you and family! I still get giddy in the weeks leading up to our next Disney vacation :-)
The restaurant you're most likely referring to is the
Garden Grill restaurant inside Epcot. This restaurant slowly moves counter-clockwise as you're sitting down and eating. As it turns, you have the opportunity to see the backdrop of some of the Epcot attractions nearby, making it an experience within an experience!
The food is good, family-style meals, which means you can eat as much as your stomach can handle :-)
It is also a character meal, featuring Chip-N-Dale, and usually Pluto. Definitely a restaurant to try with you and your loved one's.
Some other good restaurants I can recommend with the family are: Coral Reef in Epcot, Chef Mickey's at the Contemporary, Liberty Tree Tavern at Magic Kingdom, 50's Prime Time Cafe' at Hollywood Studios, and Tusker House Breakfast at Animal Kingdom.
All of those have good food and good service. Chef Mickey's and Tusker House Breakfast are character experiences featuring Mickey, Minnie, Goofy, Donald, and Pluto.
May you and family have a memorable, magical time!