Perhaps many of you have played with remote controlled toys,  such as the basic ones like cars and boats.   There are even remote controlled planes requiring a license to own.   Nowadays remote controlled toys really have many functions.   Besides having more precise motion,  some even have built-in wide angle cameras.   Some can even be controlled by cell phones,  so that we can make use of the remote controlled toys to take a look a the situation ahead.   They really are very fascinating play things.   I can't wait till I have a vacation so I can go and try them out.