Eeek -- it's alive! Make a jack-o'-lantern talk using an old baby monitor. Place the parents' unit inside the pumpkin. Kids can hide, then speak into the transmitter whenever trick-or-treaters come near. We cut up a synthetic carvable pumpkin, but this project works just as well with the real kind.
Carve synthetic pumpkins with the same tools you would use to carve a real pumpkin. Instead of cutting a lid, make an opening in the bottom big enough for the monitor. To make sure that no one sees the unit, use pushpins to tack a piece of black fabric or paper behind the pumpkin face.