For Earth Day this year, we're having kids work on "photosynthesis in a cup", i.e. the floating leaf disc experiment. You can find any number of procedures for the experiment by googling "leaf disc photosynthesis". The experiment works really well and is a great activity to illustrate this year's Chemists Celebrate Earth Day theme: "Plants: The Green Machines". Here's a photo of the cover page from the 15 Apr 10 issues of the Howard County Times. It shows two of the kids at the event at the Howard County Library's Central Branch. A link to the full story is at : http://www.explorehoward.com/news/70774/events-around-county-celebrate-40th-. he story shows another photo of one of the kids at the session and briefly mentions our library events.