* The inset illustration of the octopus on a rock captures its extraordinary pneumatic and flexible body. Produce a large-scale octopus as a group project. Some can make the central body section using a ball of newspaper covered with plaster-impregnated bandage (Mod-roc), a controllable method of using plaster of Paris. Others can make flexible arms - fatter ones from stockings stuffed with fabric, and thinner, more flexible ones by rolling newspaper in tight tubes and painting them in bright acrylic colours. Using the inset picture for reference, add the suckers by making them from bottle tops and lids covered in fabric. The bulging eyes can be made from two surplus lightweight plastic balls. The octopus can be very large and can be hung from the ceiling or attached to windows by using clothes hooks with rubber suckers (from your local DIY centre). Make other sea creatures, one of which can struggle in the tentacles of the octopus for dramatic effect, and cover the whole tableau in transparent green and blue film.