#### Answer

Although the forces exerted by the children are equal and opposite, they are not interaction partners.

#### Work Step by Step

Although the two forces exerted by the children are equal and opposite, they are not interaction partners.
The first child exerts a force on the toy. The interaction partner of this force is the equal and opposite force that the toy exerts on the first child.
The second child exerts a force on the toy. The interaction partner of this force is the equal and opposite force that the toy exerts on the second child.