I discovered tiggly one year ago with the shape. My son (now 4) and daughter (now 3) just love it and are used of shapes and math toys. We donloades tiggly submarine last week and they were very exited to get a new game. They were very interested in, specially with the octopus eating the food and the submarine washing machine. The images are very beautifull and they like to go donw to see the seebed lighted by the submarine. My son tried to touch the different fish and animals of the see because he thought that they would mouve and react like with tiggly addventure (the baloon that grow, the bees on the tree...). I think this could be a good change because it help child to spark their curiosity and I always see my child very proud of themselves when they discover a new element. Concerning the vowel, I prefered the elevator because the world choosen began with the good vowel which is easier to understand for little chill (E like Elf...) of this age. It took a little time for them to understand how to aspirate the animals and deliver them but this is I think the best way for they to learn the vowel (they have to think and try to find the same vowel than the one that blink and not just choose the one that they want). Thank you for all those apps, the kids just love them and everytime I invite some friends at home, the parents are always very interested. I would also thank your customer support that always helped me when I had difficulties.