Alfalfa and Darla kiss three times. Alfalfa runs arounds in his underwear and once it's implied that he's totally naked in front of Darla and Waldo. Several girls and boys kiss. Butch and Woim opens a door and there's a woman changing - no Actual Nudity is shown

A man at a bank pulls the beard of two guys wearing a suit and hat

Butch and Woim threaten to beat up Alfalfa and Spanky. A large dog jumps on Alfalfa. In a nightmare sequence, Alfalfa falls off a cliff and into the rocks below. In a go-cart race, the kids drive through a grocery store parking lot and knock people over. Alfalfa punches Butch in the face, knocking him into mud.

One scene that involves name-calling

The word heck is used as a childish version of hell

None.

A car causes the clubhouse to set on on fire, and there's a sequence of the boys trying to put it out.

There is an one scene where the children's get scared by lightning. No one was hurt, but it could still scare to some younger viewers for those who have an astraphobia.

The nightmare Alfalfa had with the thunder and lightning, followed by him falling off the cliff might be frightening.