Drill & Practice
17. Science Buddies
18. Funology
19. Chem4Kids
20. Tynker
21. DK Find Out!
Games
22. OK Go Sandbox
24. Turtle Diary
25. My First Garden
26. Science Kids
28. Mr. Nussbaum
29. ESL Games +
Random:
31. Smithsonian Science Education Center
32. Exploratorium
33. Smithsonian: National Air & Space Museum
34. Zooniverse