You need two planks per team similar to the above picture.  Three 8-10mm rope loops are secured through holes drilled in each plank for the teens to hold onto.  Alternately fit rope loops to go over their feet.  Use other ropes and pegs to demarcate the start and finish lines of the relay course.

Divide the group into teams of even multiples of three.  The relay is run over a short distance with half of the team at each end of the course.  Team members from each end alternately step onto the plank and hold the the ropes while they walk the planks and "race" over the course.  Prizes are awarded to the winning team.

There is a passage in Isaiah that reminds us that even youths grow tired and weary, and young men stumble and fall (Isaiah 40:31-32).  The same is true when we get disillusioned with our Christian walk.   Perhaps you have grown cold and praying and reading your Bible is the last thing you want to do.

However, our walk with Jesus does not depend on how we feel, but to keep on believing in Jesus and trusting Him to work in our lives.  Jesus promised to never leave us nor forsake us and His desire is to bring us safely to Heaven.

Isaiah goes on say that those who hope in the Lord will renew their strength and will soar on wings like eagles.  They will run and not grow weary, and will walk and not faint.

It was hard to walk on those planks, but together you managed very well.  You had to keep on believing that you could do it and you did!  Do the same in you Christian life, Jesus is with you, so keep on believing in Him and you will keep on going! God bless.