Sorry for starting a new thread but I just got lost in which one to add this.
For the past 2 semesters I have used these '[sorts] for a problem solving option in addition to the Unit 1 Problem Solving activities. It has been great. The students get frustrated but have come to the realization they have learned something with each one.
I have also used Minute To Win It Mondays to learn from activities from the old game show (search these on YouTube - MTWI-Blueprints). Students have enjoyed these plus it gets them up and moving. They liked it so much we kept doing them every Monday for the semester. I tried to complete the activities that had mostly recycled materials to keep costs down.