Mr Dunfilling invents a new toothpaste but unfortunately it is green and has explosive qualities. However, it makes an excellent rocket fuel and he finally finds some aliens who find it's just what they need.

The last of the four Mr Dunfilling books and the only one still in print. Unfortunately it is also my least successful book!! I did produce one more story called Mr Dunfilling and The Tongue Twister Sisters which you can read in the Stories section of this website.

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