Help support Prairie Ridge Elementary by purchasing Krispy Kreme Digital Dozens Today! Digital Dozens are $10 each. For each dozen purchased Prairie Ridge PTO will receive $5. Vouchers will be emailed out on Friday of the week that you purchased your voucher. These vouchers are good at any Krispy Kreme location so you can ask family and friends to purchase dozens or give dozens as a gift. These vouchers also make great gifts for teachers, co-workers and employees.