I’ve been known for pulling up to a local splash pad and unleashing a tornado toddler in her regular clothes; which is fun and spontaneous, however, I questioned my sanity afterward when I thought, “What the heck will I put on her in until we get home?”
Here is a list of summer splash pad essentials that you’ll want in tow for any visits (spontaneous or planned).
Bathing suit (With rash guard, if possible)
Sunglasses and a wide brimmed hat (Like Gilligan)
Reusable or disposable swim diapers
Flip-flops or water shoes
More Details at Source: http://www.chicagoparent.com/community/stroller-squad-in-the-suburbs/blogs/splash-pads