Most toddlers start walking between 12 and 15 months of age.

Toddlers typically start speaking their first words between 12 and 15 months of age.

Toddlers typically start showing stranger anxiety between 9 and 12 months of age.

Toddlers typically start showing separation anxiety between 9 and 12 months of age.

Toddlers typically start showing tantrums between 12 and 15 months of age.

Toddlers typically start showing parallel play between 18 and 24 months of age.

Toddlers typically start showing associative play between 24 and 30 months of age.

Toddlers typically start showing cooperative play between 30 and 36 months of age.

Toddlers typically start showing symbolic play between 24 and 30 months of age.

Toddlers typically start showing pretend play between 30 and 36 months of age.

Toddlers typically start showing self-control between 36 and 42 months of age.

Toddlers typically start showing empathy between 36 and 42 months of age.

Toddlers typically start showing independence between 36 and 42 months of age.

Toddlers typically start showing self-awareness between 36 and 42 months of age.

Toddlers typically start showing a sense of humor between 36 and 42 months of age.