Smithsonian Albert Einstein Talking Bobblehead ress the button and hear this Albert Einstein Talking Bobblehead utter four immutable Einstein truths: "Energy equals mass times the speed of light squared" "The important thing to do is not to stop questioning" "If the facts dont fit the theory, change the facts" "The true sign of intelligence is not knowledge but imagination." This talking bobblehead of Albert Einstein holds chalk and a chalkboard, the better to teach what he has discovered. Albert Einstein fun facts are printed on the box. Measures approximately 8"h. x 4.5"w. x 4.5"l. Comes with three replaceable AG3 batteries. Ages 13 and up.