Here are some fantastic crafts that I stumbled upon the web that while the directions don't say to use a glue gun, you most certainly could! And in some cases using a glue gun would significantly speed up the process towards completion!
Junk Mail Gems created gift bags from well, junk mail!
Curbly made these paper cherry blossoms glued to real tree branches.
Cheeky Magpie took a old paperback book and made it into an apple!
Craftzine, the dependable source for great crafts posted this turtorial on papier-mache flower brooches.
Crafts Forum Blog has this entry from member Tip Top on creating a pinwheel from scratch to adorn the front of cards or whatever you desire!
Wow, love these paper craft works. lovely
wow...awesome!