I have been running a blog series called Inventors of Tomorrow. Each post includes a full array of activities for a 2 hour STE(A)M enrichment class for children age 3 – 6. I am moving all those posts over to a separate blog: http://inventorsoftomorrow.com/.
You will still find posts on STEM topics and outdoor education on this blog: just click on “STEM activities” or “nature activities” on the right hand side bar. (On a mobile device, scroll to the bottom of the page.)