Siblings are often a child’s first playmates. But as any parent knows, that doesn’t mean they’ll always play together peacefully. Kids have difficulty seeing things from other people’s perspectives, and naturally assume that the world revolves around them. Some children—like those with ADHD or autism—need help thinking about each other’s minds, or how to coordinate their behaviors with someone else’s.

Here are some ideas for trying to set up kids for thinking collaboratively when they play.