Mr Pink-Whistle's Party (Enid Blyton: Happy Days)

Mr Pink-Whistle is half brownie and half person, and his friend Sooty, the big black cat, can talk. But Mr Pink-Whistle can also make himself invisible, which means that he can do what he enjoys most - helping people.

When Merry catches measles, she thinks she won't be able to go to the big party, but kind Mr Pink-Whistle plans a surprise for her instead...