They cost about £60, however on the basis that OcUK are now stocking toys too I'd better not give a link as I guess they would be considered competitors
Well as fuel cells are becoming more and more affordable this isnt too far into the future, the thing is creating a efficient enough electrolysis process to compliment this.
They only travel something like 100 yards before they need a recharge - which is pretty impressive in real terms technology wise, but terribly impractical as a toy.
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