Loch Ness and Beauly are two places my grandpa (my dad's dad) spent some time and always recalled fondly. It's my dad wanting to go where his dad went.
Aww, lovely.
Was just surprised, as there isn't too much there, however there is a nice old priory. And a children's farm you can go visit and pet the animals.
The Glen Ord Distillery isn't far from there.
Stirling is a great place to start! The Castle is quite impressive, as is the Wallace Monument.
Up the way on the A9 towards Inverness if you're coming up from Stirling, Killiecrankie is a great walk with some stunning scenery, likewise, the Hermitage. Pitlochry is a nice place to stop off and have a bite to eat and wander (and right there is the Edradour distillery, which is the smallest in Scotland and still made traditionally). The House of Bruar is also on the way up the A9. Their food hall is good fun and lots of shopping and the Falls of Bruar if you need to stretch your legs
Inverness itself is a bit of a dump (shhhh) without much actually going for it (except the Castle Tavern, the Phoenix, Hootanany’s, Eden Court for some shows, and the Mustard Seed restaurant). But it’s the surrounding areas that make it worth coming up this way!
I, personally, find Culloden Battlefield boring because I find that it's just a big 'ole field, but if it's your thing, go for it. Clava Cairns is down behind that, and that's quite interesting!
No trip to Loch Ness would be incomplete without a visit to Urquhart Castle. You could do a Jacobite cruise, which is quite a nice way to see the loch. Your wee’un may enjoy the Loch Ness Monster exhibition centres.
From the other side, Dores is a nice wee village (and they have a great pub) and the Falls of Foyers are lovely.
To head up further north, Ullapool is a nice place to go to (great scenery and a really good chippie). Or go up to Gairloch or Aultbea.
For a fun drive, head to Applecross!! If the weather is good, you’ll get some cracking views and a really fun curvy road and a cozy Scottish pub to visit.
Or drive over to Skye and go drive around there (pretty darn impressive). On the way you’ll get to see Eilean Donan Castle, which is the quintessential Scottish castle. Then you can visit the village of Plockton (which has palm trees) and there’s another fun petting zoo there (hehehe, you can tell we’re into booze and animals).
Loads to do. Let me know if you want more ideas, I’m full of em.