Cool Idea..1st Birthday Time Capsule - spray paint an old tin and mod podge a picture from baby's one year shoot and a message. Ask everyone to bring something for it, and have everyone sign the tin as well. I think you could do it every year
A time capsule, made in an archival box lined with acid-free paper, can hold your baby's most precious items, from the first pair of baby shoes to disposal diapers. Include important memories too -- photos, videos, and a laminated front page of a local newspaper.
Who says you can’t make time stand still? Your child will be amazed when they open this extraordinary keepsake box years from now! Fill it with photos, letters, news clippings and other memorabilia from their first year.
Create a time capsule on your baby's first birthday for them to open on their 18th birthday... have people at the 1st party write notes or put something in (newpaper from that day, current top artist album, etc.)