As a temporary solution you can use a manual version of quizzing, such as:
- Clapping your hands in the place of where the quizzer would jump (the difficulty being determining which quizzer's clap was first based on the sound).
- As a different manual solution, you can also have one person quizmaster and then have another person (the quizmaster's assistant/content judge) hold a piece of paper up and level to cover where the quizzers are sitting and whoever is visible to assistant first when jumping gets wins the toss-up quesiton and a chance to earn their team 20 points.
(Being able to use quizzing equipment makes quizzing more fun through fairness and accuracy.)