I had to try out the 100 gumballs on the 100th day idea from Pinterest. The idea came from Jessica at The Littlest Scholars. For specifics on how to make the gumball machine (see the comments) and a free download for the words, check out Jessica's post 100th Day!
To start, I had to consider how we were going to make 100 gumballs. I thought about bingo daubers, but I was not sure I could find 10 different colors. I was also afraid that they would just start daubing and not keep up with how many circles they had made. I also considered colored dot stickers for the gumballs, but ultimately, I made the most of the laser cutter in the workroom.
I assembled the gumball machines in advance to save time. I modeled the process for the students, then sent them to their tables to get started. I had the students use ten frames to keep track of their gumballs. I placed a bowl of colored circles in the center of the table, the students counted out 10 "gumballs" as they placed them in their ten frame, then counted them once more as they glued them onto their gumball machine. For this lesson, I stressed counting to 10, skip counting to 100, and that 10 groups of 10 make 100.
Each child started with a gumball machine and a ten frame. I rotated the bowls of colored circles around the room to each table in a circular motion. In cases with slower students, left some behind for them and moved the rest of the bowl to the next table.