2′ of 1/2″ CPVC pipe (Few hardware stores sell this in lengths of less than 5′.)

one CPVC end cap

a 6″ length of 1″ by 2″ pine board

a 5″ length of 1″ by 1/2″ pine trim

two #12 hose clamps (about 5″ long, used on hoses 11/16″ to 1 1/4″ in diameter)

two 1″ wood screws

two 1/2″ wood screws

a small, nonconductive enclosure, such as a throat-lozenge or candy box

a disposable 35 mm camera with a flash

an empty 35 mm camera film canister

one 10k ohm resistor (coded with brown-black-orange stripes)

one SPST (single pole, single throw) momentary push-button switch, such as RadioShack part #275-1571

one SPST mini-toggle switch, such as RadioShack part #275-612

duct tape

22- or 24-gauge insulated, stranded-core hook-up wire

three straight pins

a pencil with brand new eraser

Gorilla Glue

electrical tape

2′ of 1/4″ dowel (or a 2′ scrap of bamboo garden stake, leftover from making FedEx Kites in Chapter 23)

a canister of Binaca breath spray

a bag of mini marshmallows (for ammunition)

(optional) a AA battery holder and a second SPST mini-toggle switch

(optional) double-sided, foam-backed tape

(optional) a second SPST momentary push-button switch, which makes RadioShack part #275-1571 a good buy, since it includes two identical switches