found at https://d43fweuh3sg51.cloudfront.net/media/assets/wgbh/tdc02/tdc02_img_cellgallery/tdc02_img_cellgallery.jpg

Build a Cell

1) Visit https://www.spongelab.com/browse/index.cfm

2) Create a free account or sign in

3) Search for Build a Cell

4) Build all 4 types (plant, animal bacterial...) using the tabs at the top of the screen.