I have been asking some questions in the forum - and now everything's ready!
Here are the photos of the process:

5 seeds : at first, all seeds floated. But, as I soaked them for 46 hours, 4 of them sunk.

Right after I put seeds in cases. Numbers written on caps are how many droplets of water are put, and alphabets are whether the seed in the case sunk of float. I am trying to find which condition is best for seeds to germinate.

Put some soil on top, and then sealed.

Attached all of them together to make it easier to put them somewhere, which made them look like a stick.

I am going to attach them to window to get enough heat, and this black paper will help the sunshine to be absorbed, providing heat.

Now the germination stick is complete.

Attached the stick on window - using lots of tape. I hope they would stand still, not falling, until they germinate. Bad photo
I just realized that I would have to disassemble and reassemble all the stick when one of them start to germinate. That must be a lot of work, LOL