George writes:

For the last two weeks on a Monday, Sean from Clever Cloggers has come to our school and we have busily made two exquisite roller coasters. We were split into two teams of 3 and 4.

Josh said: “It was excellent making the roller coasters.”

Jacob said: “I had lots of fun creating my roller coaster and I would definitely do it again.”

Our roller coasters were made of card which meant they were strong enough to hold a marble.

Sean set us a challenge to see whose marble took the longest to travel from the start to the finish of the roller coaster. My team won by 2.5 seconds.