By it also had a modern all season Bytown and Prescott Railway that carried passengers, lumber and supplies the kilometres to Prescott on the Saint Lawrence River and beyond. Floors of amazing exhibits, activities for kids young and old, and an Imax theatre. There are slides, climbing structures, ball pits and a smaller area for the wee ones. Ottawa International Buskerfest The ultimate live performance event, Buskerfest is a huge crowd pleaser! From museums, indoor activities, outdoor activities and parks - there's always something to do in Ottawa, no matter the season! This museum is perfect for the little ones that love planes, space and so much more. Three major rivers meet within Ottawa, making it an important trade and travel area for thousands of years.