 After the total failure it was to substitute a negative puppet  (Ruperta) with another negative puppet (Botilde), Narciso decided to  do an experiment, and instead of bringing a new negative puppet, he  created the first positive puppet ever, El Chollo. If the  contestants won it at the end of the show, the could choose any of  the prizes that would have appeared on their night to keep it. But  the experiment went wrong, as the public didnt like just a positive  puppet, and so Narciso had to make modifications a few chapters  later.