First tip: have a second very good look in the box, in the bag, and the space around you. Our experience is that the brick is hiding itself in some tiny corner. Still not found? go ahead!
To make it easy; use the construction manual to tell us which brick is missing. Make clear:
- Which Sluban set you are in.
- Which step it is,
- Take a photo and point out the brick you are looking for.
Easy as that!