Charles Blondin walked across Niagara Falls on a tightrope in 1859. Approximately 25,000 people watched the five-minute walk. On other occasions he walked across the falls on a tightrope pushing a wheelbarrow or on stilts. Idea: Children could draw a line on the playground. They could pretend the line was a tightrope. They could see if they could walk the line on stilts. Older children could read more at: Blondin.