list of Parts:
2- of 5mW line lasers,
Adafruit Line Laser Diode - 5mW 650nm Red : ID 1057 : $8.95 : Adafruit Industries, Unique & fun DIY electronics and kits
1- of Coin battery holder,
Digikey BS-5-ND http://www.digikey.com/product-search/en/battery-products/battery-holders-clips-contacts/393250?k=BS-5-ND
1- of 3V coin battery,
Digikey P138-ND CR-2016/BN Panasonic - BSG | Battery Products | DigiKey Marketplace
1-of SPST switch,
Digikey CW158-ND GPB556A05BR CW Industries | Switches | DigiKey
3 of 8-32 Flat Head Screws
24 awg wire (preferably) 2ft
5×10” piece of ½” HDPE or other easily machinable plastic

