Little Miss Helpful and the Green House is the eighth book in the Little Miss New Library series.
Little Miss Helpful overhears a conversation on the bus between Mr. Slow and Mr. Happy. Mr. Slow wishes for a greenhouse, but he is so slow, he cannot get anything done, so Little Miss Helpful decides to buy some paint from Mr. Nail's shop and paints Mr. Slow's house green. When Mr. Slow arrives home, he is very surprised to see his house painted green! Little Miss Helpful tells him that he wanted a green house, so she painted his house green. Mr. Slow corrects her by telling her he wants a greenhouse that is meant for growing fruit in.