Children's Thesaurus

[hohohoshedittant]

Can anyone recommend a good children's thesaurus please?

It's for a nearly 7 year old, quite clever, good at reading/writing, but not a genius....

Something not too easy/babyish, but not too tricky either....

We bought DD the school recommended thesaurus, Schofield and Sims 'in Other Words' last year when she was in Y3. Its a nice intro to the concept of a thesaurus and isnt too big and heavy to handle.