Interactive learning for toddlers

I would say it is effective, because babies and toddlers can quickly follow from what they hear. It's the same logic as when they learn to say "momma" or "papa". They hear it from us, and they follow. Also, audiobooks are non-conventional which stirs their interest in learning, more than the usual books. My toddler learned the alphabet letter sounds, faster when I played a voice recording. It took her only a couple days to master the sounds. So, give it a try. I would, if I get my hands on these items.