Busy boards aren't Montessori because they don't allow focus on a single skill, correct? But I've heard latch boards (2nd and 3rd pic) are Montessori. Any thoughts/suggestions for 1 year old? :
Melissa & Doug Latches Board
Lock & Latch Board - Tumble Tots
Lock & Latch Board, Melissa & Doug – Bizzybods
Melissa & Doug Wooden Latches Board | Smyths Toys UK