Chip and Melinda can push these around. Only one dirt block can be pushed at a time, but many ice blocks can be pushed at a time. When dirt blocks are pushed into water, they turn into dirt floor. Blocks cannot be pushed over dirt. When ice blocks are pushed into water, they turn into ice floor. When ice blocks are pushed into fire, they melt and turn into water. If a fire box hits an ice block, it will also melt. When ice blocks and dirt blocks are covering something you can see what it is when you are in the editor. On fire, it would look like this:
Blocks can be pushed though teleports, but they cannot be pulled through if Chip or Melinda has the hook in their possession.