You must have RAINBOW BLOCK and DRESSER to make BOOKCASE. Category: furniture. Growing BOOKCASE takes less than half a day, so no worries yeah. If you brake this all night long you will get some experience points. Hitting it will break it but you need to count the hits yourself. You get at least 1 seed back (maybe more!) from splicing BOOKCASE. Will you strike it rich? You just have to count the gems yourself. Massproducing BOOKCASE can be tricky. You will find out after you have harvested a few.