The Flea is the little brother of the Fluke and is constructed in much the same way. The top of the uke is solid wood (Australian hoop pine is standard and mahogany and koa are available) and the back and sides are molded plastic - the theory being that the top of the ukulele is what makes the sound and the back and sides have little influence.
There are some options you have with the flea. It comes in both soprano and concert sizes (with 14 and 15 frets respectively) and you can have either a plastic or rosewood fretboard. I have a plastic fretboard on my Fluke and I'd highly recommend you saving up a few more pennies to get the rosewood fretboard.
Then, of course, there's the range of colours and designs that are available: check the bottom of the page for the full list.
The Flea has to be the most celebrity endorsed ukulele around. The world's most famous Flea player is Bette Midler who has a few (often very sparkly) Fleas and endorsed this bejeweled Tiki Flea for sale in Vegas. It's also rumored that she gave a pair of ukes to Sasha and Malia Obama. Other celebrity flea players are William H Macy and Tony Danza.
On eBay US
On eBay UK
Bette Midler bust out her Flea for Ellen.
Concert Tiki Flea Review
JTPokie reviews his concert Tiki Flea
Flea and Fluke Comparison Review
Todd discusses his Flea and Fluke ukes.
Flea Colors and Designs
Poiple (purple), Bubblegum (pink), Ukelyptus (green i.e. eucalyptus), Lava (black), Mango (orange), Natural (cream), Hibiscus (red), Moonlight (metallic blue), Macademia (metallic brown).
Denim - designed like a pair of jeans.
Camp - moon and stars.
Pineapple - a sparkly update of the classic pineapple flea.
Tiki - a gaping mouthed Tiki God.
Surf - a Tiki surfboard type design.
Bark Cloth - another Tiki inspired design.