For teachers and students looking for a more challenging brain teaser, here is Smart-Kit's highly popular River Crossing Puzzle Game! The instructions and rules are in the game, but in case you want to read them here:
A farmer, his son and daughter, and their pets need to cross a river. The pets are an aggressive dog, 2 hamsters, 2 rabbits. There is a small two-seater boat they can use. All 3 people know how to use the boat, but none of the animals can. Click the motor to use the boat.
1. If the farmer is not around, the aggressive dog will bite everyone and everything.
2. If the daughter is not around, the son will tease the rabbits.
3. If the son is not around, the daughter will tease the hamsters.
4. The hamsters and rabbits get along fine with each other.
Click on the characters to move them on/off the boat.
Couple of answer submissions are already in the 'comment' section (although these are for an older river crossing puzzle we had up; try to solve it first before giving in and looking!:)
Don't forget to check out Smart-Kit's full archive of amazing yet safe school games that make for great Edu-tainment!
Here is an earlier River Crossing Puzzle you can try to figure out (more of static logic brain teaser).