So, you're living with a toddler. First off, congratulations—you’ve entered the wildest phase of parenting. Toddlers are small humans, usually between 12 months and 3 years old, who have somehow unlocked infinite energy reserves. You know that bouncing off the walls thing? That’s their brand. The term “toddler” comes from their adorable (and slightly hazardous) walking style, which involves toddling, staggering, and face-planting into anything within a 3-foot radius.