Your go-to summer activities (water parks, kiddie pools, sidewalk chalk) have been washed out by the storms. And your well of indoor activities is about to run dry.Open up the creative floodgates with Little Artists, a 50-minute, come-to-you art lesson.They bring all the supplies and expertise; you supply the space (if the sun decides to shine, think park or backyard).Your kiddo will work with mixed media to create fantastical masks, puppets, and puzzles. And since projects can be catered to your child’s interest du jour (Star Wars or butterflies, no problem) the possibilities for self-expression are endless.Little Artists also offers birthday parties complete with personalized invites and decorations, craft projects of your child’s choosing, and no goodie bag hassles.You know what they say — when it rains it pours.Little Artists (917-744-9930 or littleartistsnyc.com).HEARKids in the Square: Toe Jam Puppet Band What: Take a picnic and groove to some family-friendly tunes.Why: It’s hip to be square.When: Thurs., noon.Where: Union Square Park, South Plaza, 14th St., at Broadway.SAILFourth of July Kids’ BBQ CruiseWhat: Ride a riverboat replica, enjoy spectacular views of Lady Liberty, and feast on good eats.Why: Wave the flag.When: Sat., 2-4 p.m.; boarding, 1 p.m.Where: Hudson River Park, at Pier 40, W. Houston St. Tickets online at fohrp.org or call 212-757-0981 ext. 201.DANCEThe Wiz What: It’s the last week to see Ashanti as Dorothy in this rocking trip to Oz.Why: Ease on down the road.When: Thru Sun. Check online for showtimes.Where: New York City Center, 131 W. 55th St., b/t Sixth & Seventh Aves. Tickets online at nycitycenter.org or call 212-581-1212.