I love the idea of doing a tea party - young or old! Especially for those that don't like do drink too much ;o) I think it would be a great reason to have your girlfriends over (or your little one's girlfriends) without needing a holiday or birthday!
Of course you need tea sandwiches! Everything looks better on a tiered tray topped with fresh flowers! Even egg salad or cucumber sandwiches - inexpensive and oh so yummy! Source and recipe (curried chicken salad)
How about this sweet little detail? Tie a creamer or tea cup to the end of your tablecloth! Not only a great touch, but also practical if you are outside - it'll keep it from blowing! Source
Serve blooming teas in clear glasses or teapots - they are so beautiful to watch "bloom" and taste fantastic too! Source
How beautiful would these bottles be to serve water or ice tea in? Use a stencil or piece of lace, then stipple paint or glass etching to create a really beautiful, unique look! Source found via attentiontodetail blog
Homemade lavender sachets would make the perfect favor! They look beautiful tied off in a little ribbon. If you aren't up to sewing, just find muslin bags to fill with the fresh lavender. Source and tutorial
(I've shown these before...but thought it was worth showing again for this theme!) I came up with these cookies for my boss's bday. I cut out a tea bag shape out of wax paper and used to cut out shortbread cookie dough. I used a round frosting tip to cut a hole at the top of each. Baked, dipped in chocolate then threaded real thread thru and cut out paper and stamped a cupcake on each side to look like a tag. I thought they would make a great choice to serve at this theme, too!