Final answer:
The question regarding the height of steps preschoolers ages 3-5 can jump off isn't directly addressed in the references, but their ability to balance and perform similar physical activities suggests they can handle jumping off low steps under supervision.
Step-by-step explanation:
Preschool children, typically ranging from ages 3-5, demonstrate significant advancements in physical development, including motor skills allowing them to engage in various activities. By the age of four, these children can generally manage stairs one foot per step and partake in more complex physical activities like skipping on one foot or pedaling a tricycle. When it comes to jumping off steps, the specific height isn’t mentioned in the provided references. However, considering their physical development and abilities such as balancing on either foot for about ten seconds, one can infer that preschoolers can safely jump off steps that are relatively low in height matching their ability level. Safety precautions should always be in place, as coordination and balance can vary between individuals in this age range.