Vac-U-Tug is a brand name of low cost easy build boats that are great starters for kids, big and small. Mine is named Jim Dandy after the old song "Jim Dandy to the Rescue" and has the optional "big motor". When you have a very expensive boat out in the middle of the pond or whatever and it quits running you send out your rescue tug. It has 10-12 feet of floating fishing line with a bobber on the end and you go out and around and around your boat until it becomes snagged in the rudder or propeller. Then it's just a matter of towing it to shore. So far I've only used it once and it worked great.