PVC CANDLES: TIPS & TRICKS CUTTING PVC: When you get your big stick of PVC pipe, whatever the size, try not to always make 90 degree straight cuts. Candles do not burn level all the time. Cut some angles at the top like 45 degrees and other sharp angles
Make your own tinfoil portraits/sculptures. You could buy face masks and give students tinfoil. I think this would work. Would probably look even better on a black canvas or cheaper option, black card.
Spider-Filled Front Yard: Secure a skeleton to the ground with rebar; use monofilament to pose the arms. Create a swarm of spiders with inexpensive plastic foam balls and chenille stems; secure to the ground with wired florist's picks.
DIY Cosmetology Head Ghoulish Restyle Tutorial from Bascombe Mania. This is an extremely detailed tutorial of how to take a rubber/plastic head, insert a skull and come up with this scary creation. You could probably do this on rubber head dolls with.