Blood group B individuals have the B antigen on the surface of their RBCs, and blood serum containing IgM antibodies against the A antigen. Therefore, a group B individual can receive blood only from individuals of groups B or O (with B being preferable), and can donate blood to individuals with type B or AB.
Language development usually signals the development of memory and the understanding required to get time out. . Dr. Sears recommends starting time out at 18 months and expects that toddlers will understand it by 2. . For toddlers many developmental experts recommend natural consequences rather than or along with timeouts.
At the start of this period, most kids can follow directions and say 50 or more words. Many combine words in short phrases and sentences. By age 3, a toddler's vocabulary usually is 200 or more words, and many kids can string together three- or four-word sentences. Kids at this stage of language development can understand more and speak more clearly. By now, you should be able to understand about 75% of what your toddler says.