There isn't a lot of things there for someone of that age to interact with.
I would say no.
I don't think there are enough attractions for an 18 m/o to warrant the hassle.
I took my 1 year old with my 7 yr and it was awful! There's barley room for a stroller not to mention the way they over pack the place it makes for a stressful experience as is led alone with a younger child
I wouldn't suggest it.
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