In advance, I traced all 7 pictures (Dalmatian, gumball machine, sunflower, cherry tree, pizza, fishbowl and fish) onto colored butcher paper by projecting the images on my Smartboard. This took about an hour. The next day I spent another hour after school outlining all the pictures with a Sharpie marker. The 3rd day I cut out all the pictures - note for next year, that sunflower took FOREVER to cut out!
On the 100th Day I let each student choose which project they wanted to work on. Since I had 28 kiddos that day it worked out perfectly with 4 kids per project. Once they were in their groups they had to choose a team leader who would be the person in charge of assigning tasks and securing supplies. Then they wrote up a list of what they needed - scissors, glue the different colors of construction paper they wanted, and items to trace to make their pieces.
Once they had their supplies they got to work tracing, cutting and counting, and then traced, cut and counted some more! They were very surprised by how long it took them to get to 100! We had read Counting Coconuts by Wendy Silvano last week. It is a great book for skip counting, and by referring back to it, each group came to the conclusion that it would be easiest to make 10 piles of 10.