NN	Part			Digikey Link		Qty		Price
1 	Capacitor 100n		732-7532-1-ND  		7 (buy 10)	0.20
2	Capacitor 1uF		587-2477-1-ND  		4		0.11 x4
3	Resistor 10K		RMCF0402JT10K0CT-ND	3 (buy 10)	0.12 
4	Resistor 6.2K		RMCF0402FT6K20CT-ND 	1		0.10
5	Microcontroller		336-2579-1-ND  		1		1.54
6	Connector header	S9005E-05-ND		1		1.00
7	Battery holder 2xAA	377-1559-ND 		1		1.70
8 	Copper clad		473-1000-ND		1		5.86
9 	TPS61222		296-39435-1-ND 		1		1.14
10	Inductor		490-17887-1-ND		1		0.38
11	Voltage reg		MCP1703T-3302E/CBCT-ND	1		0.56
12	Tactile switch		401-1810-ND		1		0.58 
13	LCD display		1481-1232-ND  		1		20.15
14 	Connector		S7002-ND 		2		0.45 x2
15	Slider switch		CKN10722CT-ND 		1		0.54


Laser (maybe you find a better one)
https://www.amazon.com/HiLetgo-10pcs-650nm-Diode-Laser/dp/B071FT9HSV/ref=sr_1_39?keywords=laser&qid=1551145079&s=gateway&sr=8-39