To learn this trick, your dog is going to need some foreknowledge on some other tricks.
Your kids won’t be able to teach the dog this trick themselves, unless they’re older, but make sure to include them.
Start by playing tug and say the “take it” command when you want your dog to pick up the rope toy, and then the “give” when you want him to release the rope.
Have your dog “give” the rope, but then toss it a few feet away and say “take it.” Click and treat when he picks up the rope. Your dog should be excited about the tug game, and will come back to play some more.
But if he or she doesn’t, repeat the “take it” step but this time get him or her to bring it to you with the “come” command. Say “give” and click and treat. The kids are going to love this one.