SCIENCE KITS
Elementary  -  for preschool and grades 1-3
Simply Science  -  for grades 2-5
Discovery Series - for grades 5 and up
Popular - age range varies
Classroom Kits  - for different age groups

MAGNETS
Bulk | Ceramic | Science Lab | Roll, Strip & Sheet 
Letters & Numbers | Hobby | Magna Box

FUN WITH MAGNETS
Magnetic Modules | Magic Penny | Levitron 
Magic Wall | Wonderboard