In honor of May Day -- here are a few links, courtesy of clickschooling.com.

For the younger children:  Grow virtual flowers in a window box:

http://www.pbs.org/parents/creativity/sensory/windowboxes.html

Count flower petals:

http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html#petals

For the older children:  American Field Guide

http://www.pbs.org/americanfieldguide/teachers/flowers/flowers_sum.html

Happy May!

 Sherry