The Department for Children, Schools and Families loved what we'd done in our first two books and wanted to get one in every school.

The only problem was Action 008: Have a bath with someone you love, which was deemed inappropriate for 7-12 year olds.

Which gave us the brilliant excuse to make a kids' book.

We launched a competition asking children what simple action they would ask one million people to do to change the world. 

Erica suggested we teach our grannies to text. Cato and Edward told us to Walk our Dads. Jone told us to not start a war. All good advice.

We had over 4,500 contributions from across the UK which we whittled down to the 30 actions in Teach Your Granny to Text and other ways to Change the World. And they were all fun to do to. There were maps to colour in, seeds to plant and stickers to stick.

Thanks to the DCSF, every school in the country has a copy to stick and tear and grow and unfold.

Look out for the relaunch of the same book under the new title of 31 Ways to Change the World, which will be coming out in the spring.