The natural distribution area of Common hackberry is located in eastern North America. The tree is susceptible to fire damage. The fruits are eaten by birds and other animals.
Memory development. The development of memory in children becomes evident within the first 3 years of a child's life as they show considerable advances in declarative memory. This enhancement continues into adolescence with major developments in short term memory, working memory, long term memory and autobiographical memory.
At the age of 3, children enter sensitive periods related to reading and writing. A fascination with tactile objects helps toddlers develop fine motor skills around age 2. According to Maria Montessori, the early childhood educator, children move through 11 distinct sensitive periods by the age of 6. Montessori hypothesized that a child's development may be enhanced by providing the right kind of stimuli during the sensitive periods.