Native English teacher needed

I am looking for a native English teacher for my 8 and 6 year old (twins) kids, 2 hours (5/ 5.30 to 7/ 7.30) both Mondays and Wednesdays. We are more interested in them doing fun activities rather than proper structured English lessons and are therefore looking for 
someone who gets on well with the children and is able to make them play and involve them in English conversation.