mBot is a two-wheel Arduino-based robot that can be used by children aged 8 years old and above. It comes with built-in sensors and actuators, and can be programmed using MakeBlock and Scratch, a graphical programming language. Due to its simple and appealing way of use, it makes teaching and learning programming simple and fun. 
Children can start from assembling their robot with a screwdriver and step-by-step instructions, then they can control it with a device through its application, and as they go, they will learn about a variety of robotic machinery and electronic parts, get to grips with the fundamentals of block-based programming, and develop their logical thinking and design skills. 
The mBot is also extensible, with a lot of components available that can be used to build various robots and be engaged in a variety of hands-on STEAM and coding. 

The BBC micro:bit is a pocket-sized open-source hardware ARM- based embedded computer system that can be used to teach children and apply coding within physical computing. It has an LED light display, buttons, sensors and many input/output features that, when programmed, let it interact with you and your world. 
 

• The front of BBC micro:bit has 25 programmable LEDs arranged in a 5 x 5 grid, two programmable buttons, a programmable touch logo and a microphone indicator.
• The back of the BBC micro:bit has the microphone, processor, speaker, radio/Bluetooth antenna, accelerometer, and compass.
• There is also a built-in light sensor and temperature sensor, as well as pins along the bottom that can be used to connect accessories. The BBC micro:bit can be plugged into a computer with a USB connector or accessed through an app on a tablet.
• A battery pack can be connected to the BBC micro:bit to provide portable power on the go.

Bee-Bot is a programmable autonomous robot that introducesyounger kids, from the age of 4 years old to fundamental codingideas. Students can acquire directional language, directives,sequencing, and problem-solving techniques while simply having fun.
 

Interaction with the robot focuses at:

• Decomposition: the process through which students divide a taskinto pieces and subsequently into steps.
• Algorithms: sets of instructions created by students for Bee-Botsto figure out the path, that helps them reach an essential stage inalgorithm design (and evaluation)
• Predicting: when a student imagines what will happen after thealgorithm is loaded into the Bee-Bot, as a component of logicand logical reasoning.
• Collaborating: working with others to achieve the greatestpossible result, aiding students' success.
• Perseverance: students apply a trial-and-error strategy toconstruct algorithms and programs, particularly for more difficultintegers.
• Debugging: the process of finding and correcting programfaults, as a crucial skill since bugs occur in programs all the time.