Second the Sandcastles in Parksville, always awesome to see.
If you're interested in heading to or towards Port Alberni/Tofino Hole in the Wall is a great hike and sight in Port Alberni, Long Beach as well, try and get to Tacofino if possible if you like Tacos, J & L Drive in is a great Burger spot in Port Alberni too.
Coombs - goats on the Roof is a great spot too, ice cream and market in the parking lot, James' Island Grill is beside that excellent Food Spot as well.