Birthday parties are both a blessing and a curse. Kids get tuckered out by an afternoon of free entertainment; you get stuck holding the not-so-goodie bag.When it’s your turn to host, fill it with something other than choking hazards and candy. Mabel’s Labels — beloved makers of customizable kiddie labels — just launched an affordable combo pack that makes a perfect party favor.The personalized dog tag/sticker set comes in 27 designs, including hearts, robots, and cupcakes. Stick them on everything from sippies to toys to backpacks — anything that your kids (and you) want to return home.At $5 a pop (a minimum order of six is required), you’ll spend about what you would in the dollar aisle at Target. But without feeling like a sucker.Available online at mabelslabels.com.GUSSY UPFirst Communion FairWhat: Get her ready for her big day with veils, suits, shoes, and more ($8-$180).Why: Tons of one-on-one attention make it a bit like Say Yes to the Dress. When: Sun., 1-5 p.m.Where: Monday’s Child, 218 N. Lee St., Alexandria (703-548-3505). Admission is free.WADDLEMeet Penguin BobWhat: Watch illustrator Joe Jamaldinian sketch a story on stage. Why: Hear about the adventures of his feathered friend.When: Sat., 9:30 & 11 a.m.Where: Helen Hayes Gallery at The National Theatre, 1321 Pennsylvania Ave. NW (202-628-6161). Admission is free.BONDPreschool Songs and StoriesWhat: Carve out some hang time with your tot (ages 3-5). Why: After all the singing and dancing, he won’t say no to a nap. When: Thru June 30. First and third Thurs. of every month, 11-11:45 a.m.Where: Arts Barn, 311 Kent Square Rd., Gaithersburg (301-258-6394). Participation is free.Photo: Courtesy of Mabel’s LabelsDresses and Tops for $39 & UpFinish the three-day weekend right with a wardrobe update from the likes of Cynthia Vincent, Dear Creatures, Cynthia Rowley, Generra, and more. Slashed prices (from $39) start today on our sample sale site.