DIY wedding pocket fold invites I think it is probably worth it to buy the folder and matching envelopes (cardsandpockets.com about $1/invite) but make your own invite, background, RSVP postcard, info insert and belly band with monogram
Re-purpose your leftover wine bottles by spraying them with white matte paint then use stencils (and red ribbon) to create your own Christmas message. It's quite fiddly, but worth it for the wow factor.
I support 'going Green'...however, keep in mind, "Green" product companies are also in it to MAKE MONEY. Many of these things you can MAKE so much cheaper, with what you already have in your home. The investment in time to find them is well worth it.
How to make a potato stamp - stamping ideas for kids-- Actually did this one! It was so fun! (The stamp was a little wet, though-- it took the three-year-old stamping off a lot of excess before I realized its full potential.) Also, the three-year-old and myself were the only ones who were really interested in it. But it was still totally worth it, and really fun.