I created this product to accompany the Investigations Activity: Inventory Bags. I never liked how the original only allowed the students to do one bag. I put four bags on one page. I use different colored bags instead of putting letters on the bag. I place 4 colors in the center and students have to inventory all four bags. To increase difficulty, place two types of objects in each bag. Students can compare the two amounts or later in the year, add the two amounts. There is room to do the comparing and adding activity twice on the page.