My name is William Mentz. I own Covington Studios and we are a full service Sound Lighting and Scenery Company. Depending on your budget I have some great solutions for you. Especially working with kids. You might not want something as fragile and expensive as the Countryman headsets. Contact me 570.468.0209

I would reccomend purchasing the Shure ULX-S wireless recievers and transmitters: http://www.shure.com/americas/products/wireless-systems/ulx-systems/index.htm As for the mic to plug in, I would purchase the countryman B3: http://countryman.com/store/product.asp?id=4&catid=4 I use these professionally with a majority of Community Theater company's. They will run you around $550 per tranmitter/reciever set and $160 per mic for each set.

I am in the same boat. We are actually looking for used wireless mics and receivers along with a larger board to accomadate the additional sound needs. I will keep you updated on our search if you'll do the same. :) Thanks!