[PebblesRox]

I second the Numberblocks recommendation!

The episodes are also available on Youtube, though you have to dig to find the full episodes since there are many compilations that are just snippets. Here are the playlists that actually have full episodes (though not always in order, unfortunately):

Red Level 1: https://www.youtube.com/playlist?list=PL9swKX1PviEpYtgsxNhSu... Orange Level 2: https://www.youtube.com/playlist?list=PL9swKX1PviEor1JJ9oiJw... Yellow Level 3: https://www.youtube.com/playlist?list=PL9swKX1PviErTKxhY3IGf... Green Level 4: https://www.youtube.com/playlist?list=PL9swKX1PviEqiv2RFTd7K... Blue Level 5: https://www.youtube.com/playlist?list=PL9swKX1PviErvKa4-7x8E... Season 5: https://www.youtube.com/playlist?list=PL9swKX1PviEpLQxq7gp_c... Specials: https://www.youtube.com/playlist?list=PL9swKX1PviErsBiq9poHx...