Watch full episodes and play Cat in the Hat games at http://pbskids.org/catinthehat !
Nick and Sally attempt to build their own pulley. First they try pulling with the rope alone, but that doesn’t work. When they put the rope over a tree branch, they discover the importance of having a pulley to help lift.
Watch and play more games at http://pbskids.org or download the *FREE* PBS KIDS Video and Games app at http://pbskids.org/apps/