Rune Factory?
Where do I find things like ?
Fire Crystal
Strong Vine
Water Crystal
Bird wing
Strong string
Field gloves
Glue
Fancy hat
Root
Skull
Most of that stuff can be gotten from the treasure chest drops you will see on occasion while fighting in the caves. Some items you won't have access to until you can enter the correct cave.
I reccomend checking out this site (particularly the crafting section, since it lists the ingredients and where to get them.)
http://fogu.com/hm/rune_factory/
Good luck