See the dumpster? Maybe if Rosa climbed onto it, she could reach the ladder.
Click on the dumpster and climb onto it, then click on the ladder and pick a jumping style. And shazam! --
-- Rosa slips on the ice on top of the dumpster and lands on her butt in the snow. OUCH. We need to clear the ice off the dumpster lid before we can make this work. (Though if you want a giggle, call Joey outside and fall repeatedly just to get his comments.)
Remember how we melted the ice off the brick in the Karth House? That same technique would work here.
Rosa has another cup of hot coffee; use that on the dumpster, then grab the rag from the dumpster to mop up the slop.
You can now climb onto the dumpster safely. Click on the ladder and pick a jump style; with the ice gone, any style of jump will do the job.