Can I use any other stone?

I have seen them made out of plexiglass and other types of plastics. Basically any hard and smooth material can be used to make a puzzle box.

You can also use a Mr. Clean Magic Eraser. Just hose off the fence, let it dry, then wipe it down with the magic eraser.

It is not necessary. This is just for a more finished look under the sink.

Hit the other stone at a slant, from the bottom to the top, so the top is pointier. Don't hit too hard or too soft.

The clay pieces would have to be glazed, but you can definitely carve them out of wood. You'd need special equipment if you wanted to carve them out of stone.

You can use other weeds, but the Venus Piñata Trap is the most valuable and thus the quickest to use for gaining Chocolate Coins using the selling weeds method.

You can use any color. I think black makes the most sense for the fabric because space is black, but feel free to be creative!

Villagers will sometime trade for string. Witches have a chance to drop string upon death. Steal string from other players. Use Creative Mode/Commands.

Yikes! I would put antiperspirant spray on it so it won't burn. Lead the licking dog to another room so it will be distracted when you spray it on. Just...