My son is 18 months old. His grandparents got this puzzle for him about two months ago. I thought he wouldn't understand how to do it, since the age recommendation was 3 years and up, and you have to have pretty good fine motor skills and control to swing and hold the fishing pole magnetic just right over the pieces in order to pick them up.
After about a week, he was a pro with it, picking up the pieces patiently. I was impressed and started teaching him the names of the sea creatures. So now I will tell him, "Pick up the squid," and he'll 'fish' it out and give it to me. He will do that correctly for each animal I name. He also tries to say "Octopus" "Jellyfish" "Dolphin" "Whale" and "SHARK!" (that one is yelled).
He loves this toy and it is teaching him patience and fine motor skills. It is well made and not noisy!! We love it.