Gikfun 9v Battery Holder with ON/Off Switch for Arduino (Pack of 2PCS) EK2107x2

5pack 9v Battery Clip with 2.1mm X 5.5mm Male DC Plug for Arduino by Corpco

Elegoo EL-CB-001 UNO R3 Board ATmega328P ATMEGA16U2 with USB Cable for Arduino

ARDUINO UNO R3 [A000066]

JBtek Acrylic Transparent Base Plate & Terminal Optimizer Breadboard for Arduino UNO R3

CQRobot Arduino Speaker 3 Watt 8 Ohm, JST-PH2.0 Interface. It is Ideal for a Variety of Small Electronic Projects.

SB Uno R3 Case Enclosure New Transparent Clear Computer Box Compatible with Arduino UNO R3

SunFounder RAB Holder Raspberry Pi Uno Breadboard Holder 5 in 1 Base Plate for Arduino Uno R3 Mega 2560, Raspberry Pi 3B+ 3B 2 Model B 1 Model B and 400 800 Points Breadboard

Breadboard Solderless Prototype PCB Board – ALLUS BB-009 (3pcs) 400 Pin with 4 Power Rails and Double Sided Tape for Raspberry Pi and Arduino

ELEGOO 6PCS 170 tie-Points Mini Breadboard kit for Arduino

RoboGets Arduino Uno R3 Compatible ATmega328P Microcontroller Card & USB Cable for Electronics & Robotics