Voice children's characters, male and female, for an ESL book. Up to 7 books

Looking for someone who can provide funny and engaging children's voices for up to 7 ESL books. Initial quote to be given for one book 600 words approximately. We are looking for someone who can do a few different voices, or intandem with someone else as we have both female and male characters. All currently scripted and ready to go. it comprises of vocabulary lists, and short interchanges between characters, Ideally, in a British accent.

Thamk you!