Suggestions for day walks near Eildon doable with kids?

I guess the title says it all. One of our kids is not a keen walker, so we'd welcome suggestions of short (ie. 2-4 hours not whole day) day walks near Eildon that would be ok in summer, especially if the weather is warm. I can't seem to find much on the internet.
We are experienced walkers but want to have fun with our kids, not carry, drag or nag the reluctant one.... The rest of our holidays is planned for paddling and horse riding, but I find it hard to visit a place for the first time and not explore on foot.
We are experienced walkers but want to have fun with our kids, not carry, drag or nag the reluctant one.... The rest of our holidays is planned for paddling and horse riding, but I find it hard to visit a place for the first time and not explore on foot.