Looking for family-friendly fun this weekend? Young fantasy fans can watch an already-big movie event get supersized; scientists in training can experiment with magnets; nature lovers can participate in a bird count; and the whole family can celebrate the holidays at a winter festival or a reading of a Christmas classic. It’s all happening in the Hudson Valley. Find the details here.

Saturday and Sunday: "The Hobbit: An Unexpected Journey" in IMAX 3-D in West Nyack

What’s half the size of a dwarf, yet larger than life? It’s the little hobbit, Bilbo Baggins, in IMAX 3-D. At the behest of the Wizard Gandalf, Baggins and a crew of dwarfs embark on a perilous journey to recover a lost kingdom from a terrible dragon. The 170-minute feature, which is rated PG-13, is the first in a trilogy of films adapting the children’s fantasy by J.R.R. Tolkien. Attend the IMAX midnight show – scheduled for 11:59 p.m. Thursday, to be precise -- to receive an exclusive collector’s series of four character prints (while supplies last).

>>Review: "The Hobbit: An Unexpected Journey"

When: 11:30 a.m., 3 p.m., 6:30 p.m. or 10 p.m. Saturday, Dec. 14 and Sunday, Dec. 15

Info: IMAX, Palisades Center, 4270 Palisades Center Dr., West Nyack; 845-358-4629; www.imax.com/theatres/t/imax-palisades-center; $19

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Sunday: "A Christmas Carol" in Yonkers

See the miserly Ebenezer Scrooge, the Ghost of Christmas Past and other familiar characters brought to life in a dramatic, four-actor reading of the Charles Dickens classic, “A Christmas Carol.” The 85-minute performance is recommended for ages 9 and up. After the show, enjoy cookies, cider and hot chocolate.

When: 1 p.m. Sunday, Dec. 16

Info: Hudson River Museum, 511 Warburton Ave., Yonkers; 914-963-4550; www.hrm.org; free with museum admission of $5 for adults, $3 for children, free for members

Sunday: Magic show in Yonkers

Magician Benjamin Levy will mystify kids and adults alike with cool tricks and illusions such as mind reading and sleight-of-hand magic. The performance, recommended for ages 9 and up, is part of the Hudson River Museum’s ongoing exhibit, “Magic in the Gilded Age,” which also features vintage theatrical posters, costumes and other magic-themed memorabilia.

When: 3 p.m. Sunday, Dec. 16

Info: Hudson River Museum, 511 Warburton Ave., Yonkers; 914-963-4550; www.hrm.org; $15, $10 for members