The box is good for learning words.
The box is separated in 5 sections.
Every word you want to learn you write down on a card.
One side thai the other side german and how to spell.
You put it in the first section.
Every day you take the cards from the first section and learn.
If you know a word, the card comes in the next section.
If the second section is full, you learn the second section.
If you don't know the word from the first section it stays in the section.
If you don't know a word on the other sections you put it one section back.
I would start with the simple words you need in thai the most.
Like you, me, them, look, eat, hello....