Back in the day (1993!), my 3-year-old loved the delightful Living Books collection software. The interactive CD-ROMs came bundled with paperback versions of the simple books they animated, which were written by popular children's authors. A nice touch that got children interested in reading the physical books by themselves, eventually opening up the whole world of reading to them. Maybe someone's aware of whether there are apps that are today's equivalents. If you're interested, video playthroughs of the software titles are collected at https://www.youtube.com/playlist?list=PLCAF301BEC1CA0D5D

Btw, if you haven't seen it, check out the book Teach Your Baby to Read. The first chapter in the free sample at Amazon gives a reason for why more children don't read at an early age ("We make the print too small"). Which helps explain why some children manage to learn to read words from commercials and TV shows (like Sesame Street!) - which often display words in big type as they are read by an announcer's clear voice - on their own long before they hit school. https://www.amazon.com/Teach-Your-Baby-Gentle-Revolution/dp/...

Have fun!