This Skit is meant for Boy Scouts.
Decide for yourself if it is appropriate for your younger scouts or not.

5 scouts
1 unsuspecting audience member

Three scouts lined up on their hands and knees, in a row, as bicycles.

Shop Owner: Well, there we are, three brand new bicycles all set up for sale.
Customer: I'd like to buy a bicycle.
Shop Owner: Certainly, go ahead and find one you like.
(Customer sits on the first bike and his arms give out, falling down. He tries the next which is too big and the third is too small.)
Customer: I sure like the first one, can I try it again?
Shop Owner: Just a second. (Setting up bike again) There you are, it's all set up again.
(Customer sits on it, and again it falls down.)
Customer: I don't know. I really like this one but it keeps falling down. I'm afraid it's not made well enough.
Shop Owner: Our bicycles are all very well made. It was just assembled this morning, but it seems to have a loose wheel. Let me get some help.
(The unsuspecting volunteer is chosen from the audience, who is instructed to hold one 'wheel' of the now upright bicycle - place his hand on the bicycle's elbow.)
Customer: (Sitting on the bike) That's perfect now. What was the problem?
Shop Owner: Oh, we just needed a big nut to hold it together !