Old Town

Edinburgh Castle - Visit Edinburgh Castle, a magnificent pile of rock, where the Scottish kings ruled, lived and fought against their enemies. Scads of weapons and armor in the Great Hall and be sure to see the Scottish crown jewels. The Stone of Destiny - where the Scottish kings and queens were crowned, has been returned to Scotland and is now on display in the castle. Stick around for the "one o'clock gun," fired every day at one o'clock (except Sunday).
Princes Street Gardens - The moat for Edinburgh Castle was drained in 17th century to make way for these gardens. Climb up the 200 foot Scott Monument to Sir Walter Scott for a stunning view of the city. Don't miss the statue of Scott and his dog at the base of the monument. Also, near the National Gallery of Scotland, look for the floral clock - on the quarter hour, a "cuckoo" comes out.
The 3D Loch Ness Experience - Put on 3D glasses and step into the legends of Nessie, the Loch Ness Monster - history, hoaxes, and scientific research to get to the bottom of this mystery.
Outlook Tower and Camera Obscura - From the tower, you'll get an excellent panorama of the city. The Camera Obscura, a tourist attraction since the 19th century, is a giant pinhole camera, where images of the city are projected onto a viewing area.
National Museum of Scotland – Step into a treasure trove of exhibits covering the history of Scotland. In the Early People gallery, check out an ancient oak figure, gold and silver booches, dress up as a Viking or Roman, or play a trading game. In the Discovery Zone, kids can fire mini catapults, create coats of arms, and dress up in period costumes. Other other galleries, explore the natural world and discoveries by Scottish inventors and adventurers. Newly renovated, this museum is a biggie, so allow plenty of time.
Greyfriars Bobby statue - Visit the statue of that devoted Skye terrier, the dog who mourned his master, standing guard over his grave in Greyfriars Kirkyard for 14 years. (Bobby died in 1872).
Brass Rubbing Centre (off High Street) - One family writes that they went several times to the Brass Rubbing Centre with their kids. The Centre is located in Trinity church and has a varied collection of stones and brasses to make rubbings.