Final answer:
Toddlers, typically aged 1 to 3 years, achieve significant physical development milestones such as walking, climbing stairs, and handling small objects.
Step-by-step explanation:
Toddlers, typically aged 1 to 3 years, go through significant physical development milestones. By their first birthday, most toddlers can pull themselves up to a standing position, walk with help or alone, and sit down without assistance. By age three, toddlers can climb stairs one foot per step, handle small objects, do simple puzzles, and build towers of blocks. By age five, children can carry on conversations, recognize letters and words, trace letters, and engage in physical activities like riding a bicycle and playing games.