SteamRoller is a self balancing human powered cart for two people. It could be handy to roam in the garden and need two riders to control it as each riderâs pedal will control one wheel. Maker claims for its balance as its special design do not allow it to turn upside down. SteamRoller is especially designed for kids around 5 feet, but taller person can also ride it as in the trial it worked well with taller men. This cart is not having a proper braking system. In order to stop, the riders need to stop peddling and for the emergency stop; they have to depend on their feet.
Video after the jump
Via: instructables