The History of Cartoon Network - Annex 4: Preschool blocks and Cartoonito

CN has tested the waters in preschool programming various times. The first two examples were in the 90s, with Smallworld and Big Bag. Both blocks were also shown on CN LA and BR, and Big Bag got localized versions for Brazil (on TV Cultura), France (on Canal J) and the UK (on ITV).

Small World aired short shows from Europe, the USA and Canada. Big Bag was similar, except that the shorts were contained in a show that had 30 episodes:
But neither of those blocks were successful.
CN IN, CN SEA and CN PK had Tiny TV, a block which found some success in India and eventually transferred to Pogo. CN KR also had it, prior to the adoption of the CHECK it./Sinnaneun Jaemi (Fun and Exciting) look. It also went to European shores on the Scandinavian version, as Lilletoon, in four languages: English, Swedish, Norwegian and Danish.

The Japanese, ever the individualists, proceeded to make their own pre-school block called Pipora Pepora (ピぽらペポら). This block debuted in 2003 and was a two-hour block repeated several (2-3) times a day. It was replaced by Cartoonito in 2011, in line with the brand's expansion. If Cartoonito was a channel in Japan, then Pipora Pepora could return in form of a block focusing on short-form shows.
That's just my speculation.
After attempting to push the preschool demographic with Pecola (the Korean cartoon where everyone is made out cubes) and (to some extent) Hamtaro, another experiment was made in 2005 with Tickle U.

There's no sound on this video, but you can find (very little) footage of it online.

This block lasted for a little over a year and aired mostly short-form shows like Peppa Pig, Yoko! Jakamoto! Toto!, the then-new Gerald McBoing Boing remake, Firehouse Tales, Krypto the Superdog, Gordon the Garden Gnome and Little Robots.
Oh, and Harry and his Bucket Full of Dinosaurs.
But eventually the block got cancelled here and there and pre-school programming on CN USA was reduced to Harry and his Bucket Full of Dinosaurs and a new show called Ellen's Acres. Gerald McBoing Boing moved to Boomerang. And then those shows were removed from the schedule.
Meanwhile, in the UK, Cartoonito (initially a block on CN Too) was born:

Within less than a year it finally got it's own channel, and four years later, it had become a block on various versions of Boomerang, new channels for Spain (which closed last year) and Italy, and eventually sacrificing the block at the start of 2014 on BM HQ and BM EE.
Recently Cartoonito launched a channel in Asia, and they are trying to put the brand in Latin America, but as Mariana from Toonzone pointed out months ago, the name could be Cartoonzinho in Brazil.