Every family member can be invited to participate and add their own photos. You can also elect to get monthly reminders of birthdays and anniversaries.
Create a keepsake by printing out the family tree and old photos. We treasure ours and love to look at old family photos.
Instead of T-shirts, which nobody will ever wear again, try ordering silicone bracelets in a variety of colors.
You can create a color for each branch. For example red can be for 1st cousins, green for 2nd cousins, etc. That way everyone you don't already know is easily recognizable.
A fun way to decorate the tables is to string a cotton rope from one candlestick to another. Attach photos from past and present with a mini clothespin. Ask family members to send photos to you or post them on a site. You can easily print them up for all to enjoy can collect.