(TIME SENSITIVE) fun and cheap things to do in Boynton Beach?

Hi, not a boynton resident, but I live near the town (Palm Beach County). I’m planning on going there with someone for the day but IDK what to do. I don’t want to do anything outdoors because I’m sensitive to heat (autism sensory issues). I like shopping and eating at restaurants and exploring new things (and taking photos of places to draw cartoons all over). My grandma lives there but my grandpa is sick so idk if we’ll meet. I’m going tomorrow. Any places you recommend?