Across the selection the little libros mainly appear as board books and hardcovers; those two formats are the most commonly listed.
Many include hands-on elements—lift-the-flap pages, die-cuts, raised or tactile elements and other novelty features—designed to engage young readers through touch and exploration.
Many use simple, short text with rhyming or repetitive patterns to engage early readers and encourage repeated reading.
Many are produced as board books or with sturdy cardstock and chunky pages; one listing specifically highlights a durable, toddler-friendly design.
Yes—at least one interactive title includes bilingual learning with prompts and responses in both English and Spanish; reviewers also note an English/Spanish switch and Spanish content in the selection.