Magnetic number fishing, they add what they catch! As well as addition, develops hand/eye coordination, fine motor--I love this for magnetic letter fishing too! When they catch a letter, they say its name and sound.
Go Fish: DIY Magnetic Fishing Game - I made a laminated paper Go Fish game and added a letter or frequently used word to each fish. I like how they've attached the magnet to the string of the fishing rod, seems like it would be pretty secure
A magnetic fishing game is a classic children’s toy and something you can easily make at home. We love to use ours with our frog pond small world play. I also recently shared how we use our fishing game to learn colors, numbers and size sorting.