Step-1
Paint the polystyrene semi-circles black with several coats of paint and leave to dry – you will need one for each spider you want to make.
Step-2
On the flat side of the polystyrene glue four matching pipe cleaners onto the bottom of the spider, crossing them over in the centre. Repeat for all spiders, using a different colour for each one so you can tell them apart. Leave to dry.
Step-3
Bend the pipe cleaners on the bottom into spider leg shapes. Cut a smile from orange craft foam and stick onto the top of each spider along with a pair of googly eyes.
Step-4
Making the web is like making a giant snowflake! Cut the top, bottom and sides off a bin bag so you have two square sheets. Put one sheet aside.
Step-5
Fold your square in half diagonally to form a triangle. Fold again and then again to form a smaller triangle.
Step-6
Starting at the bottom, cut the sides away keeping a thick line down the middle, as you would a paper snowflake. Continue all the way down the bin bag
Step-7
Open the bin bag out to reveal a spider web!