I just made an underwater "observer" for my kids. Take a Pringles can and poke a hole in the metal end. Use packing tape to seal the lid end onto the can. Take it out and look in the puddles!
Now we just need to wait for the tadpoles and other cool spring critters to come out! Yay!
I'll let ya'all know how long the thing lasts, but with the way we go through Pringles lately, it doesn't really matter to us if it doesn't last long!