51.  They are powered by four AA batteries.

52.  To produce as much energy as an AA alkaline battery, for instance, the paper battery would need to cover about a square foot.

53.  Two AA batteries are included.

54.  Walk into a toy store, buy all the AA batteries, stick them into every toy that will accept them, and then turn on everything.

55.  What we have here is a pair of goggles with a velcro strap, one AA battery and two speeds.

56.  When the Casio camera is used to take and display photographs, the four AA batteries needed replacement after about two hours of use.

57.  Who knew all it needed was two AA batteries?

58.  Power comes from two dozen AA batteries that are recharged by the solar panels.

59.  Just a rubber ball, a plastic foam chess set, a deck of cards and some AA batteries.

60.  Micro-Vak comes with a detachable brush and three other attachments and it runs on two AA batteries.