FRIDAY, APRIL 4

Opening reception at Conant Gallery: 6-7:30 p.m., live music and refreshments. The Conant Gallery welcomes a diverse group of artists from the Trumpet Fine Arts Gallery in Peterborough, New Hampshire. The Peterborough gallery owner, nationally known artist Mona Adisa Brooks, will display her intriguing porcelain characters alongside a wide variety of pieces from others, including work in clay, oil and encaustic paintings, and drawings. The exhibit will remain on display until June 2. Gallery visiting hours are 9 a.m. to 5 p.m., Monday through Friday; noon to 4 p.m., Saturday and Sunday. The Conant Gallery is located in Lawrence Academy's Richardson-Mees Performing Arts Center (off Route 40) in Groton. Visit www.lacademy.edu for directions.

Children's musical theater open house: Learn about Indian Hill Music School's Summer Musical Theater program at 7 p.m. on 36 King St., Littleton. "Into the Woods Jr." will be presented in partnership with Arts Nashoba in July. Come and meet the directors and staff, ask questions, register for the program. Learn more at 978-486-9524 or www.indianhillmusic.org.

SUNDAY, APRIL 6

Applewild School open house: noon. Includes campus tour and information on the kindergarten through grade 8 program, Child Development Center, preschool and day care for ages 3 and 4. For more, go to www.applewild.org or call Emily at 978-342-6053, ext. 110.

A Celebration of Spring in Song: The Mixed Choir and the Artemis Singers of First Church Unitarian (FCU) in Littleton, invite you to their spring choral concert: "A Celebration of Spring in Song," at 1 p.m. at First Church Unitarian, 19 Foster St., Littleton. The choirs will perform music by such composers as Abbie Betinis, John Rutter and Gwyneth Walker, as well as the congregation's own Niela Miller. Several pieces will feature soprano soloist Lindsay Rinaldi and clarinetist Karen Luttik, who will also perform solo works. Admission is free. A dessert reception will follow. For information and directions, visit www.fculittle.org.

TUESDAY, APRIL 8

New England Amputee Association: Informational and sharing meeting for all amputees and their caregivers, 6 p.m., Clinton Hospital. Refreshments will be served; free door prize raffle. Our meetings are open to all amputees, caregivers and healthcare professionals. For information visit www.NewEnglandAmputeeAssociation.com or call 978-365-2580.

THURSDAY, APRIL 10

WBN meeting: Workshops: Social media or discussion group of your choice for women in business. The Women's Business Network will meet at the Center on the Common, (old Harvard Library) 7 Fairbank St., Harvard, at 7:15 p.m. This month WBN offers two options: A hands-on demonstration of social media platforms and a round table discussion group for those who wish to focus on topics relevant to women in business. Bring your questions and your laptops and we will help you set up your business Facebook, LinkedIn, Pinterest, etc. account. For information, check http://www.wbn-ma.org or call Renee W. Senes, CDFA at 978-456-9600.

SATURDAY, APRIL 12

Spring Emergence Exploration: NRWA Science Saturday for 7- to 11-year-olds: We will explore the forest and look for signs that winter is melting away. Children ages 7 to 11 are invited to join Nashua River Watershed Association naturalists for our "Spring Emergence Exploration" from 12:30-2:30 p.m., at Williams Barn, a town-owned conservation property, at 160 Chicopee Row in Groton. We will see what aquatic creatures may be active near two ponds, explore the forest for freshly emerged salamanders or insects and look for newly sprouted plants, such as the famous and smelly skunk cabbage -- favorite food for waking bears! Cost: $20 for NRWA members; $25 for nonmembers. For siblings who wish to attend, pay full price for the first child, half-price for the second. Pre-registration is required -- contact Mary Marro at 978-448-0299, or email MaryM@NashuaRiverWatershed.org.

Why all this Fuss about Vernal Pools? 1:30 p.m. Rona Balco will lead a walk to one of the vernal pools in Shirley. Rona has given many presentations and innumerable walks on the uniqueness, inhabitants and value of vernal pools, and she will answer that question. The pace will be casual. The event is suitable for children and adults alike. (But please, leave your pets at home.) Dress for exploration; long pants and sturdy footwear are necessities. The ground will be uneven and, most likely, wet and muddy. Meet at the triangle formed by the intersection of Bishop Road and McPherson Road in Shirley. Letting Rona know that you are planning to attend would be appreciated: 978-779-2259. The event is sponsored by the Shirley Conservation Commission and co-sponsored by the Friends of the Oxbow NWR, and is free of charge.

NRWA April NOWW Walk: The Nashua River Watershed Association believes that by mid-April the Nashua River Rail Trail will be snow free. To celebrate, NRWA will be leading its first Outdoor Wellness Walk of the season from 3-4 p.m., on the Rail Trail beginning in Groton. The public is invited to join us for this 60-minute guided walk. Our focus is on exercise and experiencing our natural world, both parts of healthy living. There are a number of eco-systems along the trail, woods and wetlands, and we'll look for signs of spring along the way. The Rail Trail is flat and paved; the walk is free and open to all ages. For the comfort of all, no dogs are allowed. We'll meet at the Station Avenue kiosk on the trail in Groton; a Google map and directions are available at www.NashuaRiverWatershed.org. Pre-registration is encouraged for planning purposes. To pre-register, or for information, please contact Mary Marro at 978-448-0299, or email MaryM@NashuaRiverWatershed.org.

SUNDAY, APRIL 13

Country Day School open house: 1-3 p.m., 14 Main St., Groton. Applications are now available at Country Day School of the Holy Union, a private, independent, co-educational Catholic school serving 135 students in grades pre-K through 8. Located on Main Street in Groton, Country Day School draws students from Groton, as well as many surrounding towns. Parents and prospective students will be able to tour the classrooms and talk one-on-one with teachers and administrators. Information about the academic program, extracurricular activities and student life will be displayed throughout the school. Families are also encouraged to visit the school's website at www.cdsholyunion.org for more information about the school.

TUESDAY, APRIL 15

Brook Trout Populations and Watershed Dynamics: 7-9 p.m., NRWA River Resource Center, at 592 Main St., Groton. Jason Stolarski, Ph.D., aquatic biologist at the Massachusetts Division of Fisheries and Wildlife, will discuss how flowing water links natural processes to Brook Trout populations over large scales. He will describe how critical habitats are orientated throughout a landscape and how Brook Trout populations structure themselves in response to this habitat mosaic. This program is co-sponsored by the Nashua River Watershed Association and the Squan-A-Tissit Chapter of Trout Unlimited, which is based in Pepperell. Pre-registration for this free program is appreciated for planning purposes, but is not required. To pre-register, or for information, please contact Mark Archambault, 978-448-0299 or email MarkA@NashuaRiverWatershed.org.

FRIDAY, APRIL 18

Good Friday Walk: The Loaves and Fishes Food Pantry will hold its 30th annual Good Friday Walk from 7:30 a.m. to 12:30 p.m. To participate, each walker is asked to raise a minimum of $25 to benefit Supports Sharing, Inc., which helps impoverished youth in the rural South. For information or to volunteer, contact Jeanie Colony at 978-456-1239 and jecolony@charter.net or Becca Day-Newsham at 978-456-8717 and newsha@aol.com.