Thames & Kosmos Gross Gummy Candy Lab Worms And Spiders STEM Experiment KitGross new shapes, delicious new flavours! Mold your own delicious gummy worms and spiders using a natural gelatin like ingredient called carrageenan that comes from seaweed. Flavour and sweeten your mixture with mixed berry and green apple flavours and then mold the gummy worms and spiders in the included mold. You can even add citric acid to make sour gummies! Learn about the scientific properties of natural polymers. Food ingredients included.