When we were putting together this activity for the kids we had no idea it will be such a hit. They basically make their own roller coasters out of paper strips and give them their own unique name.
We cut some strips of construction paper in many different colors, as our kids love to make everything "rainbow" and we gave them some glue and black paper.
They made lines on each strip just like roller coasters have and glued them in many different ways on their black paper.
They made many different roller coaster models you wouldn't believe. It was such a great team work as well - they dove right in it the next day during their play date and created multi-paper model. (not pictured but I should take a picture of that... I know)
We found this idea over at 1+1+1=1