Ben is a Boy Scout and is currently working on the Plant Science merit badge. He thought it would be a good time to earn it since we are studying botany at home this school year.
Here are the requirements for the Plant Science Merit Badge. If you have an older child (perhaps fifth grade through high school) and want to flesh out your botany studies, I think you will find these guidelines to be excellent. The requirements are very thorough and would nicely complement the Botany in a Day and Shanleya's Quest books. There is a corresponding worksheet that can be used to record the child's work.
As a side note, I would encourage anyone who finds the Boy Scout requirements interesting to look into Scouting for your sons. The program is top notch. We have been so blessed by the wonderful families and boys that we have met through our years in Scouting. Here are the other merit badges that can be earned. I think we could base our homeschooling lessons on merit badges requirements alone and give the children an excellent education.
Here are some people who are doing just that:
Boy Scouting and the Homeschool