“Kay Benbow of BBC Studios commissioned Numberblocks as an animated series for children aged 3–6 to be developed by Essex production company Blue Zoo. The production was made in partnership with the National Centre for Excellence in the Teaching of Mathematics (NCETM) to complement the Alphablocks series.
Alphablocks is a British animated television series for preschoolers that debuted on CBeebies on 25 January 2010. The programme was created by Joe Elliot and produced by Alphablocks Ltd. It was commissioned by the BBC.” - Wikipedia
Theres also Colorblocks.