Tain Pottery, Glenmorangie Distillery, Dunrobin Castle
Possible in one day.
Take the A96 to Inverness. Take the A9 north and travel almost as far as Tain. The Tain Pottery is situated at Aldie on the A9 south of Tain. Look out for the brown and white Scottish Tourist Board sign which says "Aldie Watermill & Tain Pottery".
Return to the A9 and head north. You can stay on the bypass or drive through Tain itself. Just north of Tain on the A9 is the Glenmorangie Distillery. There is a shop and visitor centre and you can tour the distillery but there is no cafe.
Back on the A9 head north and drive through Golspie. As you reach the top of the hill out of town you'll see signs for Dunrobin Castle. This is a castle like no other in terms of its design with a very fairy tale appearance. There are lovely gardens to walk around and usually there is a birds of prey demonstration.
Make the most of your day before heading back. The non-stop drive from Nairn is around 80-100 minutes.