The instigator is the toy not the dogs. First mistake is leaving the toys out all the time.
Remove all toys and create structured play time. One toy each, monitored (give them a frozen Kong filled with a little wet food and kibble. This lasts about an hour depending on the size of the Kong and dog). When they are done remove the toys. You are the "leader" and leaders decide when play time starts and when it ends. Right now your dog thinks he's in control of the resources.
I would also advise addressing feeding. Make sure no food is left out (no bowl on the floor with food) and no food is given for free. Feed by hand for 2 weeks.
Establish control over resources.