Brain freeze.SLURPRumsiclesWhat: Cuba Libre douses fresh fruit (watermelon, blueberry, mango) with liquor to make frosty, Latin American-inspired treats. Why: On Monday (National Rum Day, duh), the first 100 people through the door nab a free pop. When: Thru Sept. 6. Free popsicles, Mon., 5-7 p.m.Where: 10 S. Second St. (215-627-0666); The Quarter in the Tropicana Casino & Resort, 2801 Pacific Ave., Atlantic City (609-348-6700).PRIMP Studio Noir Finishing SchoolWhat: Go for all-out glamour or just learn to add a little oomph to your everyday beauty routine with lessons ($75-$195) in hairstyling, makeup, and costuming from burlesque industry pros. Why: It’s about time you get a handle on tricky liquid eyeliner, Miss Butterfingers. When: Schedule online at studionoirphotography.com. Where: Sherman Mills Complex, 3502 Scotts Ln., ste. 1616 (323-481-8623). Registration (required) to firstname.lastname@example.org.GEEK OUTScience LiveWhat: Catch a glimpse of scientists preserving specimens, identifying insects, sorting fossils, and performing other behind-the-scenes tasks.Why: Indulge your morbid curiosity at the bird-skinning demo. When: Live, Mon.-Fri., 1-3 p.m. Demo, Wed.Where: The Academy of Natural Sciences, 1900 Benjamin Franklin Pkwy. (215-299-1000). Admission is $12.SPLURGESmall Oven Bakery OpensWhat: Freshly baked cream puffs piped with your choice of custard (vanilla, chocolate, or strawberry) are worth every calorie. Why: Adventurous types should opt for fluffy clouds of green tea filling. When: Mon.-Thurs., 10 a.m.-11 p.m.; Fri. & Sat., 10 a.m.-11:30 p.m.; Sun., 11 a.m.-9 p.m.Where: 1315 Walnut St., inside Tutti Frutti (215-546-9600).Photo: Jeff Fusco / Courtesy of Cuba LibreUp to 55% off EzeThe line’s classic plaid prints, gauzy textures, and easy dresses are a lesson in effortless style. Throw one of the tops over a bikini or jeans for that nonchalant je ne sais quoi. Up to 55% off today on Swirl.