This link is from The Children's Heart Institute. Coloring Book - How blood flows through the heart
How to build a Solar powered WiFi Weather Station with a Wemos board. The Wemos D1 Mini Pro have small form-factor and wide range of plug-and-play shields make it an ideal solution for quickly getting started with programming the ESP8266 SoC. It is an inexpensive way to build Internet Of things ( IoT ) and is Arduino compatible.