The Province of Ontario has some really good educational material on bears and bear safety. The teacher's guides available online targeted at different age groups might be something you could use with your boys to combine education with outdoors activity. I think getting to know as much about bears as possible is a good start. Florida Black Bears might behave a little different than Ontario Black Bears, so you want local information as well.

http://www.mnr.gov.on.ca/en/Business/Bearwise/index.html
http://www.mnr.gov.on.ca/en/Business/Bearwise/2ColumnSubPage/196968.html