Looking for a "hands on" way to teach your intermediate students the meaning of supply and demand without the messiness of a real life lemonade stand? Try out this worksheet and lesson for an online simulation where students run their own lemonade stand and determine how the cost of their product as determined by various factors. This lesson includes a worksheet for students to fill out while they do the online simulation (web address for the simulation is listed on form, a reflection form, and the teacher lesson plan. This lesson takes approximately 3 class periods and works well for third grade students on up. It requires one to two class periods in a school computer lab (no special software required). Objectives, correlation to Oregon state standards, and ideas for differentiation are also included in the lesson. This is a fantastic way to help your students understand supply, demand, and related economic terms in a kid-friendly way.