What “props” can you use in an active older adult water exercise class that would make the participants have more fun?

Noodles are the favorite “toys” in my senior aqua classes; and they’re cheap! I also use frizbees, paddles, fins (held with hands), small plastic balls from the Dollar Store, and junior-size kickboards. Members like “toys” but the personality/presence of the instructor is the most important ingredient for happy aqua exercisers.