Have you ever done a Children's Engineering project in your classroom to promote problem solving? I LOVE to walk around and just listen to the students, their way of thinking, explaining how it will work, and watching to see what they put together. It is fun to NOT be the facilitator for a change!!! Letting the kids come up with a way to solve the problem is ideal in today's math class.
Here is a website I found with 100 projects divided into basics, light and electricity, structures, materials, travel and movement, harnessing nature, environment, understanding the everyday, and miscellaneous.
Click here to go to the website and ENJOY! Let me know if you try one with your class!!!