Ed and Oucho's Excellent Inventions - Series 2 - Popper Chopper

Children's science series in which Ed and his cactus companion Oucho travel the country making inventions from bits of old rubbish they find in the back of their van. Ed and Oucho are in Bishop's Stortford trying to build Harvey's Popper Chopper, a car that makes butterscotch popcorn. Oucho is too busy making a secret present and Ed is distracted by something important he's forgotten - can they work out how to make popcorn in time, and will Oucho ever reveal who his secret present is for?