We took a wee trip to the Sea Life Centre at Loch Lomond Shores last weekend. It’s the first animal based attraction we’ve ever been to with her and she just adored it.
It was a great place to let our toddler run free for a few hours. EVERYTHING was exciting. She absolutely loved running around pointing at fish tanks, over and over and over again. The otters were a huge hit, as was touching an anemone.
It is reasonably small though. I think you’d struggle to entertain older kids for any length of time. (Disclaimer: I don’t have any older kids, so I could be wrong!)