I have DDs aged 2 and 4. They love Mister Maker, DipDap, Pingu, Charlie and Lola, Show Me Show Me, Louie, Come Outside, Octonauts and Nina and the Neurons all of which I think are great too, real quality kid's programming.
They also quite like Nuzzle and Scratch, Grampa in my Pocket, Mr Bloom, Gigglebiz, Numberjacks, Big City Park, 3rd and Bird, Squiggle It and Something Special, but can take or leave.
I forbid them to watch Waybuloo, Kerwhizz, Balamory, Mighty Mites, Green Balloon Club, Me Too and Tommy Zoom, I think they're awful.
Sorry, but I don't know how anyone could fancy Mr Bloom - eugh!