Blocks are a crucial part of many platformers and RPGs in the Mario series. In fact, they were so successful that blocks are now a great part of the platforming genre for most video game series. Blocks often release coins and items (particularly power-ups) when hit from below or ground pounded from above. Blocks are also commonly used as a platform to get to places, but some such as the Drop Block may have unwanted side-effects when stepped on, making it difficult to traverse them. Some blocks will break when hit, but most will simply become inactive Used Blocks.