Toddlers at this age are learning to move and explore in new and different ways. They often become much less interested in the work/activities that are put on their shelves and more and more interested in using those new gross motor skills and engaging in practical life.
Here are some articles for young toddlers, ages 12 to 18 months. These are roughly organized by category and from youngest (12ish months) to oldest (18ish months). But just because my child did something at one age, many of these activities are appropriate during this age range. Remember, please to follow your own child, this is not meant to be a strict curriculum but one family's example.
Parenting
Choice and Respect
The Need To Throw
An Interest in Reading
Entertaining a Sick Toddler
Ignoring the Shelf Work
The Need To Throw
An Interest in Reading
Entertaining a Sick Toddler
Ignoring the Shelf Work
Practical Life
Montessori Toddler -- Introducing Water PouringSweeping
Making Water Available
Peeling Bananas
Mornings at the Weaning Table
Independent Stool Use
Starting to {Un}dress
Washing Hands
Using a Fork
Wavy Chopper Knife
Beginning Toilet Learning -- Montessori Young Toddler Week 30
General Lists
In the Kitchen from 12 to 18 MonthsYoung Montessori Toddlers in the Kitchen
Practical Life Ideas for 1-Year-Olds
Activities
Velcro Block DIY
2 Minute Montessori Activity -- Toddler Ball Drop
Montessori Play at 13 Months
First Art Tray
Montessori Toddler Classification Cards with Printable
2 Minute Montessori Activity -- Toddler Ball Drop
Montessori Play at 13 Months
First Art Tray
Montessori Toddler Classification Cards with Printable
Young Toddler Object Permanence
Open and Close Basket
Color Themed Treasure Baskets for Toddlers
A Small Makeup Case
A Low Swing
10 minutes with Gus -- Montessori Young Toddler Week 20
A Basket of Birds
Simple Flower Work
A Lock and Key
Box with Bins -- Montessori Young Toddler Week 29
4 Art Trays at 18 Months
Biology for Montessori Toddlers -- Self Discovery Basket with Printable
Paint and Spray -- Summer Art for Toddlers
5 Ideas to Try When Family is Far Away
Evolution of Puzzles Age 1 to 2: Part One 12 to 18 Months
Open and Close Basket
Color Themed Treasure Baskets for Toddlers
A Small Makeup Case
A Low Swing
10 minutes with Gus -- Montessori Young Toddler Week 20
A Basket of Birds
Simple Flower Work
A Lock and Key
Box with Bins -- Montessori Young Toddler Week 29
4 Art Trays at 18 Months
Biology for Montessori Toddlers -- Self Discovery Basket with Printable
Paint and Spray -- Summer Art for Toddlers
5 Ideas to Try When Family is Far Away
General Lists
Montessori Work from 12 to 14 MonthsEvolution of Puzzles Age 1 to 2: Part One 12 to 18 Months
Materials
Gross Motor for Young Toddlers
Color Sorting for Montessori Toddlers
Montessori Inspired Toys 13 to 16 Months
A Few Montessori Friendly Favorites from 15 to 18 Months
Montessori Friendly Toys 16 to 19 Months
Color Sorting for Montessori Toddlers
General Lists
Montessori Friendly Toys and Materials 12 to 14 MonthsMontessori Inspired Toys 13 to 16 Months
A Few Montessori Friendly Favorites from 15 to 18 Months
Montessori Friendly Toys 16 to 19 Months
Holidays
Spaces
Montessori Floor Beds and Young ToddlersMontessori Toddler Wardrobe
Mixed Age Montessori Play Shelves
Making the Outdoors Accessible
Our Shared Montessori Playroom