The MonkMakes CO₂ Mini Kit for BBC micro:bit allows students to measure and explore carbon dioxide (CO₂) levels in indoor environments using real sensor data. Designed for education, this compact kit is ideal for projects linked to air quality, climate science, and environmental monitoring. The kit connects easily to the BBC micro:bit and uses a reliable CO₂ sensor to provide accurate readings, making it suitable for classroom investigations, STEM clubs, and project work. Students can log data, set alerts, and visualise changes in CO₂ levels over time using MakeCode or Python, helping to build skills in data handling, coding, and scientific enquiry. This kit is particularly useful for lessons around ventilation, indoor air quality, sustainability, and climate awareness, making abstract environmental concepts tangible and measurable. Key features: * CO₂ sensing kit designed for BBC micro:bit * Measures indoor carbon dioxide levels for air quality studies * Ideal for STEM, science, geography, and environmental projects * Supports MakeCode and Python * Compact format, suitable for classroom and student use