science of simple machines.
kids are pulling one end of the string to make an object on the other end of the string pop up!
the main idea behind pulleys is that they redirect the force. in our case, the bear shape is pretty light, so it’s not that hard to make it stand up. but if the bear was very heavy and hard to lift, we could attach a bucket filled with stones to the other end of the string (or rope) and allow gravity, the force that is pulling the heavy rocks down, to lift the bear.
in this activity, you can ask your child to experiment by attaching different weight 