I love this concept! With a simple click, my donation to the King County Library System Foundation or Reach Out and Read Washington grows like one of those sponge creatures I used to get as a kid. The amount a donation grows by depends on how many people water the sponge! That is, if $100,00 is raised and KCLS and Reach Out and Read each raise 10% of that amount, they get an extra 10%. So $10,000 grows into $20,000.