At dinner do word games-
there are even books of questions-iie: if you could only eat one food for a week....etc
Be patient, the kids are also testing you-if you keep feeling the need to respond (like is was said, they need to learn to entertain themselves) then they will keep asking, otherwise after awhile, the will learn.
Can you make cards to send to mom? or someone else? Bake to take home to dad?
God Bless you for helping.
I liked Mary's idea about making cards. My son thrives on a schedule Monday was Library day, Tuesday and Thursdays were Papa (dad) day, Sunday is Church day, etc. Now he's out playing with his friends every day, but before the time changed, we would designate every Wednesday as "gratitude day". He would have to do something nice for someone. Some days he would write letters or draw pictures to send to his grandparents or other family that lives far away. Other days we would make muffins to share with a neighbor or his teachers. We've gone through his toys to give away to kids that don't have lots of toys. Thank you notes to people that have done something nice for him. We live a frugal life, but there is always ways to make others feel good.
If you google "free things to do with kids in Fort Lauderdale, FL you should be able to come up with some great activities.