The seventh annual Hannibal Parks & Recreation Department Cardboard Boat races will be June 24 at the Hannibal Aquatic Center. Registration deadline for the Cardboard Boat Races is June 21. Youngsters team up to build their best cardboard boat and attempt to ride in their boats for as long as possible before the boat sinks. Boaters are tasked with building a functional craft with only cardboard and duct tape. Boat check-in is 10 a.m. June 24, with the first launch at 11 a.m. Each boat must have two passengers, ages 6-16. Rules are at www.hannibalparks.org. Trophies will be awarded to winners in the following categories: • Fastest Boat • Titanic Award • Best Decorated • Can’t Believe It’s Cardboard • Tom and Becky’s Choice Sign up at https://hannibalparks.recdesk.com/Community/Program