Challenge: Create a project that uses one or more of the time-related blocks in the Sensing category (i.e., timer, reset timer, current [year/month/date/etc.], days since 2000). Give me your birth year and month (in numerical values) and I will tell you how old you are.
This was a fun project. In my work with Filemaker database development I often had to deploy scripts involving date/date/time fields, and making calculations based on input from users. This was similar in nature.
