Quantity   Component name
1 × Jewel Box - unfinished wood 70mm High x 100mm Wide x 50mm Deep from Michael's
1 × Digispark Digispark USB development board from Digistump
1 × DC to DC Step Up Converter Search eBay for USB DC-DC boost converter
1 × Micro servo 4.3G Buy several as the quality may be low
1 × Lithium Polymer Battery 3.7V Canon NB-5L is a good choice.
1 × 8-pin female header with long leads Stackable-type header
1 × Microminiature Toggle Switch Single Pole Double Throw (SPDT)
1 × 6-pin right angle male header
1 × 3-pin right angle male header
1 × 3-pin male header This is not needed if you cut off the servo connector and wire it directly into the circuit.
1 × Strip board