Need a logo design for fun, friendly company

I need someone who specialises in log design to design me a fun professional logo. It should be able to.
- scale up
- all formats
AI.
EPS.
PDF.
SVG.
PNG.
JPG.
including me scalable...

This is for an educational service, but a fun educational service with exceptional customer service and value for money. I want bright colours and fun text, but not overly fun as it is for education and so has to be taken seriously.

Please supply samples of your work as part of the bid.