There may be one episode of this show in where Marcia's panties appear in a scene. It has aired on television before a ton of times.

The girls, mainly Marcia, wear clothing with skirts that go up to their upper thighs. It's not much of an issue as those are what girls have worn a lot during the 60s and 70s.

Lots of episodes that circle around Marcia include her trying to have her fall in love or date with guys. Some of these can be inappropriate as she sometimes flirts.

Some very, very brief references.

The term 'sex' is mentioned twice in the entire series in a sexual content.

Sometimes there is really brief comic violence.

Sometimes there is some mild violence in the ghost town and/or Hawaii episodes.

The episode "Bobby's Hero" has some very unrealistic but disturbing violence.

Just some name calling.

There is an episode where one of the main characters tries smoking to fit in, however hates it.

I wouldn't say frightening but one episode shows a family adopting and deals with the topic of racism. This can be a difficult topic or younger children to understand

The ghost town episodes and the Hawaii episodes may be scary and/or intense.