This is my first instructable, so I would love some constructive criticism :)
Step 1: Materials ...
2. Seashells. I was lucky to find these for $1 a basket at Dollar Tree. I only opened two baskets & didn't even use all of them, so I had plenty.
3. Craft foam, also $1 a pack at the Dollar Tree. I only ended up using most of a single cube, so I had plenty left over.
4. Hot glue gun & glue sticks.
5. Cutting board.
6. Sharp knife.
Since I already had the knife / cutting board but bought everything else, I think the whole thing cost me under $20 for the parts I actually used (I bought more than I needed).