My son did his name in 100 beans. His name has 5 letters so it was easy to make each letter 20 beans and glue it to cardboard we had from a package. Some kids did the number 100 in beads or beans or something. One year my twins brought in 100 keys. My step dad had a HUGE collection of keys and gave them each 100 of them. We also had a 100's party one year and every child had to bring in 100 of a type of food (like Cheerios, Goldfish, raisins, choc chips, mini marshmallows, etc.) and they make a big trail mix.
Kristi, Mommy to Josh & Nick (identical twins 6-97) Nathen (3-02), Joey (2-04), Jacob (11-05) & Aaron (12-11) I sell Tupperware!
"A person's a person, no matter how small..." Dr Seuss