Quality Montessori Materials for Toddler,
Primary and Elementary Since 1993.
E&O Montessori USA.
The beautiful wooden blue boxes are exclusively sold by E & O Montessori. The whole set contains 10 blue wooden boxes with lids. The size inside of each box is 9.0cm x 9.0cm x 2.1cm. You can put small objects, our 3.08.3a Blue Picture Cards, or your own blue cards (up to 8.5cm x 8.5cm in size) into these boxes.