I have a cabinet that is locked and I only let them choose books from there just before storytime. Otherwise I have two baskets of board books that I normally keep out, but I have been reducing the number greatly as they are all getting destroyed! It is frustrating as I want the kids to have access to books at all times and my daughter and 3 year old dcg love to sit and read to their dolls...so I don't want to put them all away...but I have so many nice books and they are getting totally trashed. I don't have a great solution either!