@haejin Thanks for all of your generosity. I just wanted to share a little story about watching your videos with my family (Wife and 2 yr old son). Our son is big into shapes and colors right now. He identifies sizes by Daddy, Mommy and Baby. His favorite triangle is the Daddy Ascending Right Triangle (ours too!). When I turn on your videos and he hears your voice, he comes running to the laptop to see all of the Triangles. We love your sense of humor as well. Once again, thank you for your generosity and keep up the great work that you are doing!

P.S. Your book recommendations are my Christmas List, hopefully Santa brings them!