Not sure whether this is the right place to post this but just looking for some recommendations for increasing speech in a little one. Mine is only 15 months and can only make one constanent sound (da). Depending on what you read it's nothing to worry about, elsewhere it seems like he might be 'behind'... so yes I'm aware I may sound ridiculous but I don't know, I'm not leaving anything to chance. Are there any books or other resources anyone would recommend to encourage talking? (Would be willing to buy if anyone's selling) x