I recently purchased these for a friend whose infant was admitted to the hospital. We received pictures and videos back the same day showing smiles and giggles they hadn't seen or heard in days, all after putting these cards up around their room. Needless to say, I immediately went to purchase them for my own newborn. I love that the cards can be easily packed together or separately into a diaper bag for on-the-go engagement. My toddler loves to "teach" the baby what animals are on the cards, and I get smiles, coos, and deep engagement with the cards that I haven't seen before.The only knock on durability is just a note that a teething little one will make dents in your cards, as proven by my first-born, but if you know anything about teething, you're probably prepared for that. I look forward to adding to our collection and gifting these to friends and family in the future.