Use 100 dot stickers to create a unique work of art - great for Day of School or anytime!--in the car, use them on the contact paper sheets in the trip journal, maybe makes it repositionable? Good idea for left over garage sale stickers.
100 Day activities: 100 gumballs in a gumball machine. Can do with a bingo dauber or make fingerprints. I'd have them choose 10 colors and make 10 gumballs of each one, so they can easily count to 100 by