(Strip Number 7212, Original Publication Date, 23 March 1986)
Panel 1: As Mike plays with some blocks, his tranquility is disturbed by the fact that a smugly-smiling Lizzie is carrying a toy robot.
Panel 2: The problem is that the toy in question happens to be his.
Panel 3: The strip proper begins with Mike interrupting Elly's super-important project by complaining about how Lizzie took his robot and Lizzie shooting back that nobody musta wanted it'cause it was jus'lyin'dere.
Panel 4: Mike says that Lizzie keeps taking his stuff while Lizzie says no, she doesn't.
Panel 5: Lizzie's insistence that Mike allowed her to play with it and his countering argument about being allowed to look at it angers Elly because arguing about nothing annoys her.
Panel 6: Having had enough of today's pointless argument about meaningless questions about toys or which one she loves best, she bellows "HOLD IT RIGHT THERE!!!"
Panel 7: Elly complains that they were getting along fine half an hour ago.
Panel 8: She then asks what wrong thing changed all that.
Panel 9: When Lizzie and Mike say that there's nothing on TV, Elly is gobsmacked.
Summary: And there you have Lynn's philosophy right there: the belief that children beat the snot out of each other for no other reason than boredom. It has nothing to do with favoritism or anything that WE MOMS do so get off our backs about pitting them against each other.