WHY THIS ONE
The quietest toy in the room is usually the loudest for language.
A study published in JAMA Pediatrics recorded families playing at home with three sets of toys. When the toys were electronic, parents used fewer words, responded to their child less often, and used far fewer of the words that actually matter at this age: animal names, colours, shapes. When the same families switched to traditional toys and books, all of it went back up.
The explanation is not complicated. When a toy talks, the adult stops. This set has no speaker, no script and nothing to press, which leaves the naming, the counting and the silly voices to you. That is where the learning lives.
Sosa, A. V. (2016). Association of the Type of Toy Used During Play With the Quantity and Quality of Parent-Infant Communication. JAMA Pediatrics, 170(2), 132 to 137.