Common Sense Note
Parents need to know that since this show is about backyard nature, there are lots of bugs and other critters, including a spider that bites (but the host doesn't not touch it and explains that you don't want to, either), slimy slugs, and some that like to eat their fellow bugs for lunch. The host makes sure to tell young viewers not to dig except where their parents don't mind, but an excited and curious young one could easily forget that word of warning. But overall this enaging educational series is perfectly age-appropriate for kid viewers.
Mention of mating (one bug even gets to do its mating dance), but there's no explanation of what mating is, and the concept is only presented in the vaguest terms.
Fairly frequent mentions of predators and what critters do to avoid ending up as another critter's lunch; the odd shot or two of a bug grabbing another for a meal.
The show does a great job encouraging curiosity about the world around us (though some parents might not agree with Schriemer's suggestions to take some of nature inside...). Close ups of some bugs -- and slime -- might not be embraced by particularly squeamish or easily frightened preschoolers, but the critters are presented as more interesting than scary overall.
Drugs / Tobacco /