In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing. Learners estimate the number of peas that will fit into something the size of a small paper cup. Learners estimate volume in part A and estimate weight in part B. Learners can calculate the number of peas that could fit in a space the size of a human brain by following the procedures outlined in part C. This lesson can be combined with viewing the "Eat your Peas" video on the Quarked website.