yes, we lived in 兒童旅館 for 2 nights, it's nice and I believe the kids like this as every rooms with different cartoon characters. They have many scheduled kid's program (e.g. drawing, cooking, dancing), playroom, swimming pool, magic show....etc.
we have also been to 海生館, it's like a mini Ocean Park, with 企鵝s, ok ga!
if you like outdoor beach games (like bananna boats), you can go to the beach (while I haven't but my friend said it's cheaper than Thailand)! can check more details for you later!