Looking for suggestions for science with these requirements...

[KristineIN]

I'm trying to do some planning and get ideas for the fall. I need something that is:
fun, hands-on, easy to pick up and go (little planning on my end) and can be used for a 5th, 3rd & 2nd grader.
So any programs like this out there?

Thanks,
Kristine

[Stacia]

Your 5th grader could do the upper level one; your 2 youngers could sit in/help the 5th grader. (My 1st grader did the elementary level one this year & it was easy -- he flew through it; enjoyed it definitely, but it lasted only half the year.)