1: Plant growth.
Trees' leaves should grow back slowly after breaking them, or die off if the tree is cut, and tree stumps should grow back into trees. The height of the tree would dictate how many leaf blocks on it. This could be combined with apples growing on some trees, to allow for apple farming. Trees should also be impossible to cut with your bare hands, but sticks could be gained from leaves by the trees. Flowers and shrooms should slowly grow and die if there's too many flowers/shrooms next to it. This would create gardening.
2: Torches
Carrying a torch should create light around you, but it burns out after a while.
3: Crafting
Another cratfing item, some sort of anvil for metal things.
4: Fishing!
Speaks for itself. Plus dynamite fishing.
5: Tickling!
When attacking a mob with a feather, it should do no damage and push them back possible with a "HEEHEEHEEHEE" sounds or w/e.
6: Wrong tools
Using the wrong tool should damage it more, and using things that aren't tools (eg Bowls) should mabye damage them, or just do nearly nothing, less than with hands.
[EDIT] Oh, yay! It got moved! Oh well.
