Parents are soon to be offered theultimate weapon to win the war over howmuch tv their children watch. instead ofconstantly fighting to ration viewing habits, they will have the job done for them by acoded electronic device. it will switch off the set once an allottedperiod runs out, leaving the child to turn toother activities the gadget, tv allowance', was invented bymiami photographer randal levenson, aformer engineer, "there was a lot of anger in the houseabout the tv and nintendo usage", said mrlevenson, 47. his response was to builtthe calculator-sized box c the levensons now use a code to set thefour hours that the three children canwatch each week. each has his own code, and when his time is up, the screen goesblank. he can find out how much time isleft by touching the button. the gadget, also controls video gamesand the video. it can block out specificperiods such as homework time andcannot disconnected by frustratedyoungsters. "they've got their lives back", said mrlevenson's wife, rusty. "not that theywere total couch potatoes, but theycertainly spent too much time in frontofthe tv. the problem before was that wewere giving up. we could only said "no" somany times. but the unemotional gadgetcan go on saying no for as long asnecessary". but being children and therefore devious, they have found ways of getting round thesystem, the set is switched off for advertisementsand they barter with each other for tvtime. they also decide any timeleft over at the end of the week can becarried over into the next. — — — — — — — — — — — — — — — —— — — — — — — — — — — — — — — —— — — — — — — — — — — — — — — 1. which will sell in britain for e49 thissummer 2. such as reading or even playing in thefresh air 3. if not beating it 4. who despaired of ever reducing histhree children's screen time 5. which programmes more than one childwants to watch 6. which can be used for reducing the timein front of the tv