Items of Tin or Aluminum.
Crystal is the traditional gift, for more information on traditional wedding anniversary gifts there is a link below.
The traditional gift is made of paper .
The traditional gift for 10 years is tin or aluminum. However, the modern gift is diamond jewelry. Wikipedia search "wedding anniversary" and scroll down a bit.
Traditional: PaperModern: Clock
The 4th wedding anniversary gift would be flowers,& fruits.
There are no traditional gifts for a 29th wedding anniversary. The modern gift for a 29th wedding anniversary is new furniture. You can give a couple a gift for their home or something that you know they will like for their anniversary if you do not want to use the modern gift idea.
sapphire (traditional and modern)
Wood
paper
furniture
porcelain
bronze