Watercolor Paper - 16"x20" work well and is a suitable framing size for a party of 100+ people. 11"x14" is good for about 50+, and 8"x10" is good for parties of 20+
Pencil
Pen - you'll need one that won't bleed if you want to paint over it with watercolors
Watercolor Paints - If desired
Frame - sized to match the paper
Ink Pads
Extra Pens
Hand Towelettes
It works best if you frame the image without the glass in front of it. I put the glass behind the image in the frame to keep it safe. Get 2 different shades of green stamp pads to use for the leaves. Michael's or Joann's will have a variety of colors. You may choose 2 standard green leaf color or you may want to use different
colors such as brown, orange and yellow for an autumn look or pink and purple for a spring, floral look. Purple and pink might be cute for a girl's baby shower. Blue and green would look cute for a boy's baby shower.
Make sure to get hand towelettes for people to clean off their fingers and have a basket or trash near by for the disposal of those. Amazon is a great place to buy the individually wrapped ones. Be sure to have a couple pens for people to sign with as well. After the wedding, place it behind the glass and enjoy it forever. I arranged mine in the center of a collage of wedding photos.
If your tree isn't turning out how you want, you can buy one from me on etsy!