DUO - the Extra Set for parallel double runs
Playing in double mode
With DUO, not just one marble rolls. Two can start a race at the same time. The elements enable parallel runs and turn your construction into a playground for exciting races or harmonious synchronized runs.
Whether one Marble or two: DUO is an Extra Set for all those who like to compare, experiment and sometimes think two ways at the same time.
Extra sets expand the starter sets and offer additional fun.