Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
Two "Giraffe" have same height but different saving space. Depend on father’s economic base have biggish and thicker space to save money. The smaller and thin space is for kid. First save one piece of space can take a piece from the other. To upgrade the child will be willing to save money ,competing with "excitation",and finally the inner is whose Giraffe is taller having more money.