I'm going to show you how to grow delicate tin crystals using toilet cleaner. NOTE: The solution IS a strong acid. Don't use any metal containers as it may get corroded use plastic containers or glass ware.
You Can Buy Tin Online or in a local store, MAKE SURE IT'S TIN NOW ALUMINUM.
Step 1: Making the Solution
Pour Some Some Toilet Cleaner (Must Contain Hydrochloric acid, I recommend 15%+) into a container. Then put some tin inside the container, make sure you remove the oxide layer first: sand it or melt it in a stove and pour the liquid tin on a flat surface to harden (Tin melts on a ordinary Kitchen Stove). The amount of tin required depends on how concentrated the solution is.
Leave it in the container for at least a week or two.
Step 2: Collect the Solution
After A Week, the solution should be clear, you may have a dark colored insolvent in the bottom of the container. pour the solution into a bottle (recommended), Try to get as little insolvent as possible, There maybe some tin left, if so then get it out, You can use the tin later.
Step 3: Make the Crystal
Get a large lid or a lid or something and pour the solution in.
here is the full explanation on the step: https://www.youtube.com/watch?v=r-YbQN_twpw