Characters forming the gang:
Lee, 5-6 year old boy
Rose, 4-5 year old girl
Sam, 2-3 year old boy
Lucy, 8-9 month old girl
Rose and Sam are brother and sister. So are Lee and Lucy. All 4 are friends and have loads of amusing adventures together while they discover the world, acquire good habits and grow up.
As the characters are different ages, this enables us to deal with a range of topics related with different stages of growing up. The adults play a secondary role; they only appear in the situations in which their presence is required for safety reasons. The 4 friends help each other and deal with the various situations that arise.
Thus, the books accompany readers aged from 2 to 6 years old. The readers and characters grow together. As there are both male and female characters, it is easy for the children to relate with one of them.