Once there were two sisters who loved each other very much. Sometimes the little sister wanted the big sister to do things for her and the big sister loved to try to please her. One day the little sister wanted the big sister to pull her to the top of a steep hill on a sledge. The big sister tried very hard to pull the little sister, but the little sister was too heavy. The big sister gave one big pull on the sledge...
...it didn't end well!
Thankfully the little sister thought it all tremendous fun and continued to love the big sister very much.