Tiny indoor greenhouse - diy

As spring seems to be beginning soon I thought it would be a good time to plant herbs. I love fresh herbs in my cooking, it gives meals a special flavour, fresh and full of taste. So I usually have frozen herbs in the freezer and a pot of basil on our kitchen window sill. Most herb plants in a pot I bought in the supermarket though don't survive, so the idea of cultivating herbs myself came into my mind. There is also a plant which is used in Korean dishes, called perilla leafs (sesame leafs), that I really love but cannot buy freshly here. I would love to grow this plant myself and got some perilla seeds to try it out. As I have no experience as a gardener I was not sure which way would be best to start growing plants from seeds. So I surfed the net and found an easy and simple idea to build a tiny indoor greenhouse here.
All you need are eggshells, an egg container, some soil and a plastic bag. Well, why not trying it out?

Just fill the eggshells with a little soil and scatter the seeds on top, fill it up with a little more soil and pour some water. Additionally to the perilla seeds I did some eggshells with oregano and thyme seeds. Those herb seeds are sooooo tiny it was impossible to scatter them evenly. If they would all germinate it will get very crowded in the eggshell.

Then place the filled eggshell into the egg container and cover it with a plastic bag with some holes for air. I placed my mini greenhouse on the window sill and hope that I will see plants growing.

When they have developped leaves and roots they can be repotted into a bigger container, the eggshell can be broken softly without damaging the delicate roots. Well, this is theory right now.
I tried to grow perilla last year in a little glass jar with kitchen tissue as underground. They germinated and developped tiny leaves and roots but when repotting them into soil I damaged the roots that got stuck in the kitchen tissue. I planted them with kitchen tissue still on the roots into soil but the tissue would never dissolve and the roots did not grow further. So that was the first planting experience disaster. Hope this one will work out better!