Quantity   Component name
1 × Robot including six 6V servos https://www.ebay.ca/itm/283332818283. Make sure it includes the servos.
1 × LoLin NodeMCU V3. This is a 3.3V device. 6V on most pins will damage it.
2 × 17X10 protoboards
1 × Dupont Jumper wires
1 × Minleaf NPS3010W 110V/220V Digital Adjustable DC Power Supply 0-30V 0-10A 300W. Power supply must be capable of 6VDC 6A min
1 × USB charger and cable for Nodemcu
5 × photoresistor to sense ball position for Plinko
5 × 4.7K resistor for Plinko
1 × ADS1115 four 16-bit analog input expander board for Plinko $3 on ebay https://www.ebay.com/sch/i.html?_from=R40&_nkw=ads1115&_sa