One IOT device that is used day-to day life is a google home speaker; AKA a smart speaker. It can tell you your reminders, the weather what time is it etc. It can answer all of your questions an help you stay organized
my idea for the mesh is everytime you spike the volleyball hard enough , a light sensor goes off or for the ball to count how many times you can ****p it and for every ten times you ****p it the light goes off