This is a cross post from my TP Craft site. If you are interested in other crafty projects using toilet paper and paper towel rolls then you should check it out.
Marble Run Supply List: 10-12 paper towel rolls, hot glue gun, magnets, scissors, marble
Cut out the edges on each of the tubes.
Use the hot glue gun to attach magnets to the side of the tubes. Please do not allow your children to use a hot glue gun. I did this part while Cole was napping.
Line up your tubes on a magnetic surface. This would be a great activity to do on your fridge. We just got a new stainless steel fridge and it is not magnetic so we did out marble run on the laundry room door.
Here is a video of our little activity. It was a HUGE hit!