Home » Toddlers » Older Toddlers: 24 thru 35 months Older Toddlers: 24 thru 35 months Learn about the importance of development for two-year-olds 24 through 35 months. Developmental Alerts Unlock your two-year-old’s potential with the right toys and activitiesfor older toddlers twenty-four through thirty-five months. Toy and Activity Guide