baby growing model
balloon, rubber
battery by fruit 3 in 1 kit
battery coin
battery lemon / fruit
battery checking meter
battery box, new design
battery holder GPA
basic battery study kit
bench movable for laboratory
beat OHP transparency
bimetallic flag
bimetallic thermostat system
big reflecting mirror
black box kit
bug viewer
bottle display platform
bromine diffusion tube
brownian movement smoke cell
bunsen burner
bimetallic thermometer
boiling steam apparatus
bottle safety tray
black & silver flask
bounding disc
bounding ball set
bounding sucker
bounding bean
brush test tube / bottles