Just in case you don’t want your kids to use their cell phones during a dinner, now you can block them in an elegant way. Instead of taking away their phones, you can use one of these portable mobile phone signal jammers and easily prevent GSM, CDMA, DCS, PHS and 3G signals from reaching your kid’s mobile phone. The jammer has a range of up to 40 feet and could be yours for about $40. Not that expensive for a quiet dinner, don’t you think?