Every once in a while, I make these guest books for each room in a westcoast resort. I've probably shown these before, but here is one from the latest batch. Luckily I have found a local beach that has a great selection of shells. It used to be a real problem in Port Alberni! I even had to call a seafood restaurant one time!
It's always a challenge to drill the shells. I do it under water - it disperses the heat and keeps the dust down. Lots of shells have sharp edges - one time I let one go and it spun around with the drill bit and cut my finger. I didn't like that..... Needless to say, I have a new respect for bivalves.
Let me know if you ever write in one of these. You'll know it's mine because there is a label inside the back cover.