Paddle Wheel Boat - By Hal Kelly. Here‘s a boat that's a barrel of fun for the kids and you build it for less than 35 dollars. Building this boat will really put you in solid with the small fry. that is if you give them a chance to play With it when it's finished. And the job takes no more than a weekend for anyone who can cut wood along a line. You don't even need pcwer tools, though they're great for doing a fast job. When it comes to moving the boat, Junior needs only a few minutes of practice befor he's in complete control. A four year old can do it and a six year old can make it go faster than an adult.