Thanks a lot, ejamer!
Found all the drops but i still have to find last 5 puzzle pieces.
I know where at least one is (in the world 3 on the left page right where that above and left of that center area) it seems like it's behind a breakable wall in there but i can't get there as ice block...
Whatever, does this game have significant 100% bonus? Because if it doesn't besides text bubble congratulating me that i collected all rainbow drops i don't feel looking for last puzzle pieces.