Display a jar of Peanut Butter and a jar of Jelly. A tube is placed over each jar. The Peanut & Butter jar jumps under the Jelly tube. They continue jumping back & forth switching places. The kids are yelling "No that jar, not that jar!"
You are under control which jar appears under which tube.
Beautiful cover tubes! Last a lifetime.
Fantastic Birthday Party fun time!
Bonus KILLER ENDING included in the instructions!