I Want to Be a Builder For Kids: Discover the Tools, Teamwork, and Imagination Behind Every Great Build.

Grodan 1" x 1" Starter Plug Rockwool Hydroponic Grow Media (50 Cubes) (Full Size) (50 Cubes) (Full Size)

Ceoighe Photocell Sensor for Outdoor Light, 120-277VAC 50/60 Hz Swivel Mount Photocell IP54 Waterproof, Dusk to Dawn Sensor Photoelectric for High Power Loads in Commercial or Industrial(1 Pack)

4PcsThin Film Pressure Sensor 0.4 mm 20g-2Kg Force Sensitivity Resistor Sensor for Arduino DIY Industrial Precise Measurement Control

6 Pcs 10K 3950 Temperature Sensor Probe, 1 M Waterproof 10K Thermistor, Stainless Steel NTC Thermistor Sensor Probe for Refrigerator, Aquarium, Industrial, Water Dispenser Parts etc

Tzone RS485 Temperature Humidity Sensor Modbus RTU Temp Sensor Digital Industrial Temp and Humidity Transmitter Wall Mounted,-40℉ to 257℉ Temperature Probe Analog Moisture Monitor Greenhouse Grow Tent

NSI Industries TORK ZSS124 Electronic Photocontrol - Stem & Swivel - Advanced LongLife ZeroCross - Instant Response - 8A LED Rated - 105-305V

NSI Industries TORK ZB124 Electronic Photocontrol - Button - Advanced LongLife ZeroCross - Instant Response - 8A LED Rated - 105-305V

4Pcs Thin Film Pressure Sensor 20g-2Kg High Sensitivity Force Sensitive Resistor Force Sensor Pressure Sensors for Arduino DIY Industrial Precise Measurement Control