Can someone please help me think of an idea for this. My teacher wants me to think of a gadget that uses two simple machines, and it has to be able to help a child or an elderly person with a house hold chore. Please help me come up with an idea.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to