Voki lets you create an animated, speaking character that you can embed into your blog with information and comments.
There is a free version with limited characters to choose from or a Classroom version you can pay for with more features and classroom resources.
You create your character from a wide selection of faces, clothing and accessories – you can make an avatar of yourslef or a fictional character. Once you have finished creating you can add a voice, either by recording your own or using a text to talk feature (which has a selection of accents). The avatar resonds to the location of the user’s mouse cursor.
You could use voki to create a character that updates bloggers on school events, set tasks for pupils or comment on pupil work.